What is the Difference between Denatured ethanol and Absolute Ethanol?
Q. What is the Difference between Denatured ethanol and Absolute Ethanol? Also what is the uses of each one? Thank you,
Asked by vverklin - Sun Feb 24 19:42:02 2008 - - 3 Answers - 0 Comments
A. Denatured alcohol has one or more substances added to it to prevent it from being used for drinking. This type of alcohol is for solvent/industrial use. It could be used in a chemical laboratory, if the additives don't interfere with your reactions. Absolute alcohol is anhydrous alcohol for use in a chemical laboratory etc. Since they often dry the alcohol by addition of benzene and then distilling off the ternerary azeotrope (alcohol/water/benzene) it might still contain a little benzene. Sometimes they use other drying methods, however. Supposedly the 95% ethanol (95% ethanol/5% water) is the one that could be drunk, but I am not absolutely certain. I would suggest you spend the extra money to get real liquor if that is your ulterior… [cont.]
Answered by Flying Dragon - Sun Feb 24 19:59:34 2008
Q. What is the Difference between Denatured ethanol and Absolute Ethanol? Also what is the uses of each one? Thank you,
Asked by vverklin - Sun Feb 24 19:42:02 2008 - - 3 Answers - 0 Comments
A. Denatured alcohol has one or more substances added to it to prevent it from being used for drinking. This type of alcohol is for solvent/industrial use. It could be used in a chemical laboratory, if the additives don't interfere with your reactions. Absolute alcohol is anhydrous alcohol for use in a chemical laboratory etc. Since they often dry the alcohol by addition of benzene and then distilling off the ternerary azeotrope (alcohol/water/benzene) it might still contain a little benzene. Sometimes they use other drying methods, however. Supposedly the 95% ethanol (95% ethanol/5% water) is the one that could be drunk, but I am not absolutely certain. I would suggest you spend the extra money to get real liquor if that is your ulterior… [cont.]
Answered by Flying Dragon - Sun Feb 24 19:59:34 2008
What percentage denatured ethanol is usually used as a solvent for food in general?
Q. I'm using it for a science fair project but I'm not sure whether to buy 70% ethanol or 99% ethanol--the only types found at Superstore last time I checked. My teacher only told me that I can get it from basically any grocery store or drug store. Please help! Thank-you. I'm using it in my experiment as a solvent for peppers.
Asked by Happy_go_Lucky - Sun Jan 4 16:22:46 2009 - - 1 Answers - 0 Comments
A. I've never quite heard of ethanol used as a solvent for food. However, I know that 70%-75% ethanol is used for simple sterilization in biology laboratories. Like to spray on gloved hands after working with cells.
Answered by ~A~ - Sun Jan 4 16:29:23 2009
Q. I'm using it for a science fair project but I'm not sure whether to buy 70% ethanol or 99% ethanol--the only types found at Superstore last time I checked. My teacher only told me that I can get it from basically any grocery store or drug store. Please help! Thank-you. I'm using it in my experiment as a solvent for peppers.
Asked by Happy_go_Lucky - Sun Jan 4 16:22:46 2009 - - 1 Answers - 0 Comments
A. I've never quite heard of ethanol used as a solvent for food. However, I know that 70%-75% ethanol is used for simple sterilization in biology laboratories. Like to spray on gloved hands after working with cells.
Answered by ~A~ - Sun Jan 4 16:29:23 2009
How much ethanol can a gasoline engine run on?
Q. Can you convert a gasoline engine to run off of pure ethanol? If so what is the cost? Is this comparable to running a diesel engine on used vegetable oil?
Asked by yellow - Mon Mar 23 15:15:59 2009 - - 1 Answers - 0 Comments
A. How far do you want to drive?...
Answered by David M - Thu Mar 26 10:11:55 2009
Q. Can you convert a gasoline engine to run off of pure ethanol? If so what is the cost? Is this comparable to running a diesel engine on used vegetable oil?
Asked by yellow - Mon Mar 23 15:15:59 2009 - - 1 Answers - 0 Comments
A. How far do you want to drive?...
Answered by David M - Thu Mar 26 10:11:55 2009
How can I prepare a series 4 aqueous ethanol solutions?
Q. I want to know how I can prepare a series 4 aqueous ethanol solutions precisely known concentration in the range 0.01% to 0.1% ethanol by volume. I have to use absolute ethanol to make the solutions and make 10ml of each solution.
Asked by dk - Thu Jan 28 02:03:12 2010 - - 1 Answers - 0 Comments
A. First you need to work fairly quickly as absolute ethanol absorbs moisture from the air quite rapidly.Don't leave the top off the bottle! It also evaporates. To make a 0.1% soln by volume, you'd need to take 0.1mL and make up to 100mL scaling down, that is 0.01mL made up to 10mL To measure the alcohol you'd need to use a micropipette and know the technique. Empty into a 10mL volumetric flask then flush syringe with water into flask. Mix, then make up to exactly 10.00mL To be honest, wouldn't it be simpler to take exactly 1mL from a micropipette and make up to 1L Take your 10 mL sample. Then take 100mL of your 0.1% solution and make that up to 1L to get your 0.01% solution. You could make in between concentrations by other dilutions… [cont.]
Answered by Colin - Thu Jan 28 11:51:08 2010
Q. I want to know how I can prepare a series 4 aqueous ethanol solutions precisely known concentration in the range 0.01% to 0.1% ethanol by volume. I have to use absolute ethanol to make the solutions and make 10ml of each solution.
Asked by dk - Thu Jan 28 02:03:12 2010 - - 1 Answers - 0 Comments
A. First you need to work fairly quickly as absolute ethanol absorbs moisture from the air quite rapidly.Don't leave the top off the bottle! It also evaporates. To make a 0.1% soln by volume, you'd need to take 0.1mL and make up to 100mL scaling down, that is 0.01mL made up to 10mL To measure the alcohol you'd need to use a micropipette and know the technique. Empty into a 10mL volumetric flask then flush syringe with water into flask. Mix, then make up to exactly 10.00mL To be honest, wouldn't it be simpler to take exactly 1mL from a micropipette and make up to 1L Take your 10 mL sample. Then take 100mL of your 0.1% solution and make that up to 1L to get your 0.01% solution. You could make in between concentrations by other dilutions… [cont.]
Answered by Colin - Thu Jan 28 11:51:08 2010
What is the physical state of ethanol at room temperature?
Q. Ethanol melts a -114.1 degrees celcius and boils at 78.5 degrees celcius. What is the physical state of ethanol at room temperature?
Asked by <3 ur eyes dont lie <3 - Sun Sep 21 17:07:36 2008 - - 2 Answers - 0 Comments
A. Ethanol is in liquid state at room temperature. Normal room temperature never goes up (even in the hottest places) more than the boiling point of ethanol. And the lowest temperature would not be so low either for ethanol to freeze. So ethanol exists as liquid at room temperature. I hope you know that boiling point means the temperature at which ethanol evaporates and escapes as gas. Hope it helped!
Answered by Spandan - Sun Sep 21 17:13:36 2008
Q. Ethanol melts a -114.1 degrees celcius and boils at 78.5 degrees celcius. What is the physical state of ethanol at room temperature?
Asked by <3 ur eyes dont lie <3 - Sun Sep 21 17:07:36 2008 - - 2 Answers - 0 Comments
A. Ethanol is in liquid state at room temperature. Normal room temperature never goes up (even in the hottest places) more than the boiling point of ethanol. And the lowest temperature would not be so low either for ethanol to freeze. So ethanol exists as liquid at room temperature. I hope you know that boiling point means the temperature at which ethanol evaporates and escapes as gas. Hope it helped!
Answered by Spandan - Sun Sep 21 17:13:36 2008
What is the vapor pressure of ethanol and water of this wine, and what is the mole fraction of these component
Q. The vapor pressure of ethanol at 40 degrees C is about 35 mm Hg, and the vapor pressure of water at 40 degrees C is 55 mm Hg. A sample of wine at this temperature has a mole fraction of ethanol of 0.10, and a mole fraction of water of 0.90. What is the vapor pressure of ethanol and water of this wine, and what is the mole fraction of these components in the vapor?
Asked by S D - Thu Jul 3 01:21:49 2008 - - 1 Answers - 0 Comments
A. According to Raoult's law, the vapor pressure of a solution is just the vapor pressure of its parts added up and multiplied by their mole fraction. For example, since ethanol is 35 mm Hg and its mole fraction is 0.1, ethanol's contribution is 3.5 mm Hg. Since water is 55 mm Hg and its mole fraction is 0.9, water's contribution is 49.5 mm Hg. Adding them up, the total vapor pressure is 3.5 + 49.5=53 mm Hg Note that this makes the assumption that the solution is ideal. You would need to know the heat of solution in order to predict changes from this value. Since that's not given, this is the best you can do. The mole fraction of the components in the vapor is just the vapor pressure of each component divided by the total vapor… [cont.]
Answered by Michael C - Thu Jul 3 03:44:27 2008
Q. The vapor pressure of ethanol at 40 degrees C is about 35 mm Hg, and the vapor pressure of water at 40 degrees C is 55 mm Hg. A sample of wine at this temperature has a mole fraction of ethanol of 0.10, and a mole fraction of water of 0.90. What is the vapor pressure of ethanol and water of this wine, and what is the mole fraction of these components in the vapor?
Asked by S D - Thu Jul 3 01:21:49 2008 - - 1 Answers - 0 Comments
A. According to Raoult's law, the vapor pressure of a solution is just the vapor pressure of its parts added up and multiplied by their mole fraction. For example, since ethanol is 35 mm Hg and its mole fraction is 0.1, ethanol's contribution is 3.5 mm Hg. Since water is 55 mm Hg and its mole fraction is 0.9, water's contribution is 49.5 mm Hg. Adding them up, the total vapor pressure is 3.5 + 49.5=53 mm Hg Note that this makes the assumption that the solution is ideal. You would need to know the heat of solution in order to predict changes from this value. Since that's not given, this is the best you can do. The mole fraction of the components in the vapor is just the vapor pressure of each component divided by the total vapor… [cont.]
Answered by Michael C - Thu Jul 3 03:44:27 2008
Why is it illegal in the United States to operate a car on 100% ethanol?
Q. There are exceptions for off-road vehicles like Indy cars and farm equipment, but it is illegal to operate a regular car with pure ethanol. Ethanol-burning cars need to be running on a certain minimum percentage of gasoline as well as ethanol. This is not the case in several other countries. So why is it illegal here, with burning ethanol releasing significantly less carbon into the atmosphere than gasoline, and it also being cheaper to produce, and allowing greater independence from foreign oil?
Asked by MvL - Tue Apr 29 20:47:03 2008 - - 5 Answers - 0 Comments
A. Because it's legal for off road vehicles, race cars and such - I would strongly suspect that is has every thing to do with gasoline and E-85 taxes - both federal and state.
Answered by LeAnne - Tue Apr 29 21:14:07 2008
Q. There are exceptions for off-road vehicles like Indy cars and farm equipment, but it is illegal to operate a regular car with pure ethanol. Ethanol-burning cars need to be running on a certain minimum percentage of gasoline as well as ethanol. This is not the case in several other countries. So why is it illegal here, with burning ethanol releasing significantly less carbon into the atmosphere than gasoline, and it also being cheaper to produce, and allowing greater independence from foreign oil?
Asked by MvL - Tue Apr 29 20:47:03 2008 - - 5 Answers - 0 Comments
A. Because it's legal for off road vehicles, race cars and such - I would strongly suspect that is has every thing to do with gasoline and E-85 taxes - both federal and state.
Answered by LeAnne - Tue Apr 29 21:14:07 2008
How many ppm and % is 390000 mg/L of ethanol in a 200mL bottle of water?
Q. I have a 200mL bottle of water that has been contaminated with ethanol. The concentration of ethanol is 39000 mg/L. What is the percentage of the bottle that is ethanol and how many parts per million of ethanol are in the bottle?
Asked by jas114 - Thu Jan 10 15:57:18 2008 - - 1 Answers - 0 Comments
A. Percentage and parts per million are dimensionless quantities. Assuming a solution density of 1g/mL, the ethanol percentage is calculated as follows: 39000 mg/L * 1L/1000mL * 1g/1000mg * 1g/mL= 0.39g/g Multiply the above dimensionless result by 100% for the percentage (39%), or multiply the result by 10^6 ppm for the parts per million (39000 ppm).
Answered by luminolic73 - Thu Jan 10 16:39:17 2008
Q. I have a 200mL bottle of water that has been contaminated with ethanol. The concentration of ethanol is 39000 mg/L. What is the percentage of the bottle that is ethanol and how many parts per million of ethanol are in the bottle?
Asked by jas114 - Thu Jan 10 15:57:18 2008 - - 1 Answers - 0 Comments
A. Percentage and parts per million are dimensionless quantities. Assuming a solution density of 1g/mL, the ethanol percentage is calculated as follows: 39000 mg/L * 1L/1000mL * 1g/1000mg * 1g/mL= 0.39g/g Multiply the above dimensionless result by 100% for the percentage (39%), or multiply the result by 10^6 ppm for the parts per million (39000 ppm).
Answered by luminolic73 - Thu Jan 10 16:39:17 2008
Is using ethanol mix gasoline good for older cars?
Q. I think I read somewhere that using this mix in older cars is not a very good thing to do. Is this true. Also which gas stations are just straight gas alone without ethanol? I know chevron uses the 10% mix.
Asked by biglo b - Tue Jun 8 15:57:11 2010 - - 1 Answers - 0 Comments
A. No it's not. Some of the rubber parts used in older cars can dissolve in ethanol.
Answered by Bob - Tue Jun 8 16:06:11 2010
Q. I think I read somewhere that using this mix in older cars is not a very good thing to do. Is this true. Also which gas stations are just straight gas alone without ethanol? I know chevron uses the 10% mix.
Asked by biglo b - Tue Jun 8 15:57:11 2010 - - 1 Answers - 0 Comments
A. No it's not. Some of the rubber parts used in older cars can dissolve in ethanol.
Answered by Bob - Tue Jun 8 16:06:11 2010
What is experimental setup for azeotropic distillation of ethanol water system?
Q. I want to remove water from my reaction mixture, Toluene is not good solvent for it, and so i need to use ethanol for azeotropic distillation. I wish to know do i have to use dean stark, or normal distillation assembly may serve my purpose? Thnx a lot GlennR, I got the point. I just need keep on adding ethanol and distill it out for sevral hrs.
Asked by Blix - Tue Mar 30 22:22:08 2010 - - 1 Answers - 0 Comments
A. You don't need a Dean Stark apparatus, ethanol and water are miscible so you wouldn't be able to remove water with your trap, now if it was toluene and water, then it would help. With ethanol water you will have to keep adding ethanol and boiling it off until the water is gone.
Answered by GlennR - Tue Mar 30 22:36:08 2010
Q. I want to remove water from my reaction mixture, Toluene is not good solvent for it, and so i need to use ethanol for azeotropic distillation. I wish to know do i have to use dean stark, or normal distillation assembly may serve my purpose? Thnx a lot GlennR, I got the point. I just need keep on adding ethanol and distill it out for sevral hrs.
Asked by Blix - Tue Mar 30 22:22:08 2010 - - 1 Answers - 0 Comments
A. You don't need a Dean Stark apparatus, ethanol and water are miscible so you wouldn't be able to remove water with your trap, now if it was toluene and water, then it would help. With ethanol water you will have to keep adding ethanol and boiling it off until the water is gone.
Answered by GlennR - Tue Mar 30 22:36:08 2010
How does E85 ethanol actually work in the engine? Since it is a lower octane do the pistons need to be shorter
Q. Since E85 ethanol has a lower octane..which means it has a lower combustion temperature...does that mean the pistons have to be smaller to reach the optimum height required to propel the vehicle?
Asked by narlysnow - Wed Jun 25 17:33:38 2008 - - 1 Answers - 0 Comments
A. E85 is higher in octane than regular gas. If your car is a flex fuel car then nothing needs to be done. The only difference is that E85 does not have as many BTU's as straight gas
Answered by kds11860 - Wed Jun 25 17:43:41 2008
Q. Since E85 ethanol has a lower octane..which means it has a lower combustion temperature...does that mean the pistons have to be smaller to reach the optimum height required to propel the vehicle?
Asked by narlysnow - Wed Jun 25 17:33:38 2008 - - 1 Answers - 0 Comments
A. E85 is higher in octane than regular gas. If your car is a flex fuel car then nothing needs to be done. The only difference is that E85 does not have as many BTU's as straight gas
Answered by kds11860 - Wed Jun 25 17:43:41 2008
What is the process for converting a car to ethanol?
Q. Is there a conversion kit for older models? What part of the system must be changed? I understand that an ethanol mix is fast becoming a cheaper way to run a car, is this true?
Asked by arewethereyet - Fri Jun 16 08:10:38 2006 - - 6 Answers - 0 Comments
A. cars can safely run on a 10% ethanol to gas mixture and today service stations are converting their pumps to do this. Some new cars can run E85 which is 85% ethanol. Those cars have yellow gas caps. It appears that car manufacturers will be converting to E85 in the future. Although any car will run on Ethanol. It is highly corrosive and will destroy any parts in the fuel system made of rubber and generally corrode the whole fuel system eventually. The car's computer program will have to be altered to properly burn ethanol. Its not easy to convert a gasoline only car to use E85. No kits to do it are available that I'm aware of, except Brazil has one, $1000 or so and I doubt it covers everything that will be needed. If you REALLY want to… [cont.]
Answered by ThereIsNoHope - Fri Jun 16 08:51:17 2006
Q. Is there a conversion kit for older models? What part of the system must be changed? I understand that an ethanol mix is fast becoming a cheaper way to run a car, is this true?
Asked by arewethereyet - Fri Jun 16 08:10:38 2006 - - 6 Answers - 0 Comments
A. cars can safely run on a 10% ethanol to gas mixture and today service stations are converting their pumps to do this. Some new cars can run E85 which is 85% ethanol. Those cars have yellow gas caps. It appears that car manufacturers will be converting to E85 in the future. Although any car will run on Ethanol. It is highly corrosive and will destroy any parts in the fuel system made of rubber and generally corrode the whole fuel system eventually. The car's computer program will have to be altered to properly burn ethanol. Its not easy to convert a gasoline only car to use E85. No kits to do it are available that I'm aware of, except Brazil has one, $1000 or so and I doubt it covers everything that will be needed. If you REALLY want to… [cont.]
Answered by ThereIsNoHope - Fri Jun 16 08:51:17 2006
Ethanol is presently used in small quantities mixed with gasoline. There are some cars developed today which?
Q. Ethanol is presently used in small quantities mixed with gasoline. There are some cars developed today which can run on virtually any combination of ethanol-gasoline mixtures. If the density of ethanol is 0.789 kg/L and the products of combustion are carbon dioxide and water vapour, what is the energy released when 50.0 L of ethanol is completely burned in a car?
Asked by A L - Wed Jun 16 01:46:49 2010 - - 1 Answers - 0 Comments
A. Determine how much ethanol you have: Density is defined as Mass/Volume Mass = Density x Volume Mass = (50.0 L)(0.789 kg/L) Mass = 39.45 kg = 39450 g # moles = Mass/ MW MW of ethanol (C2H5OH) C: 12.0 x 2 = 24.0 H: 6 x 1.0 = 6.0 O: 16.0 x 1 = 16.0 Total = 46.0 g/mol Moles = 39450 g/ 46.0 g/mol 857.61 moles Heat of combustion = 1377 kJ/mol (based on Heat of Combustion Table from Wikipedia Total energy = (857.61 moles)(1377 kJ/mol) Total energy = 1.181 x 10^6 kJ
Answered by Kristie - Wed Jun 16 02:17:56 2010
Q. Ethanol is presently used in small quantities mixed with gasoline. There are some cars developed today which can run on virtually any combination of ethanol-gasoline mixtures. If the density of ethanol is 0.789 kg/L and the products of combustion are carbon dioxide and water vapour, what is the energy released when 50.0 L of ethanol is completely burned in a car?
Asked by A L - Wed Jun 16 01:46:49 2010 - - 1 Answers - 0 Comments
A. Determine how much ethanol you have: Density is defined as Mass/Volume Mass = Density x Volume Mass = (50.0 L)(0.789 kg/L) Mass = 39.45 kg = 39450 g # moles = Mass/ MW MW of ethanol (C2H5OH) C: 12.0 x 2 = 24.0 H: 6 x 1.0 = 6.0 O: 16.0 x 1 = 16.0 Total = 46.0 g/mol Moles = 39450 g/ 46.0 g/mol 857.61 moles Heat of combustion = 1377 kJ/mol (based on Heat of Combustion Table from Wikipedia Total energy = (857.61 moles)(1377 kJ/mol) Total energy = 1.181 x 10^6 kJ
Answered by Kristie - Wed Jun 16 02:17:56 2010
Do you think it is morally wrong to use ethanol? What is a better alternative to ethanol?
Q. I ask this because much of the ethanol we use in our vehicles comes from grains which are high in starch. The more ethanol produced, the less food is available. This results in higher food prices. This makes it harder for people living in poorer nations to afford the food they need to survive.
Asked by PB - Wed Aug 13 17:49:36 2008 - - 21 Answers - 0 Comments
A. Sorry, but you are falling victim to the lies of the oil companies. Get the facts. Not one person in human history has ever starved as a result of using ethanol as a fuel. Brazil has been using it for 30 years and has never had 1 documented case of human suffering due to food shortages caused by ethanol. 1/3 of all corn grown in the US is exported to other countries to feed them. This is AFTER we meet all of our food and ethanol needs. Growing demand for ethanol is leading to world record corn planting and output, increasing the supply of food. And food corn is not used to make ethanol. Feed corn is used. The distiller's grain leftover after ethanol is made from feed corn is utilized to feed farm animals. Myth---Ethanol production… [cont.]
Answered by Matt S - Thu Aug 14 09:00:54 2008
Q. I ask this because much of the ethanol we use in our vehicles comes from grains which are high in starch. The more ethanol produced, the less food is available. This results in higher food prices. This makes it harder for people living in poorer nations to afford the food they need to survive.
Asked by PB - Wed Aug 13 17:49:36 2008 - - 21 Answers - 0 Comments
A. Sorry, but you are falling victim to the lies of the oil companies. Get the facts. Not one person in human history has ever starved as a result of using ethanol as a fuel. Brazil has been using it for 30 years and has never had 1 documented case of human suffering due to food shortages caused by ethanol. 1/3 of all corn grown in the US is exported to other countries to feed them. This is AFTER we meet all of our food and ethanol needs. Growing demand for ethanol is leading to world record corn planting and output, increasing the supply of food. And food corn is not used to make ethanol. Feed corn is used. The distiller's grain leftover after ethanol is made from feed corn is utilized to feed farm animals. Myth---Ethanol production… [cont.]
Answered by Matt S - Thu Aug 14 09:00:54 2008
Do you think purchasing stocks in ethanol companies is a good idea. I like a company called Xethanol?
Q. I am hearing alot about ethanol and I am seeing it at my gas station. I was thinking about buying ethanol stocks in a company call Xethanol (XNL). Do you think this is a good idea.
Asked by SESTATES - Fri Aug 24 21:18:02 2007 - - 2 Answers - 0 Comments
A. allwas get some news on the company before you invest in them and as of now 3 out of 5 analyst are saying to sell the stock not to buy. here is some news on them for you... Xethanol Corporation (AMEX: XNL), a renewable energy company, today reported financial results for the three and six months ended June 30, 2007. For the second quarter of 2007, the company reported a net loss of $6.6 million, or ($0.23) per share, as compared to a $5.9 million net loss, or ($0.24) per share, for the same period of the prior year. The increase in the net loss was primarily related to $4.5 million in non-cash charges including a $2.8 million impairment charge on property held for development. For the three months ended June 30, 2007, the weighted… [cont.]
Answered by shawn k - Fri Aug 24 23:48:56 2007
Q. I am hearing alot about ethanol and I am seeing it at my gas station. I was thinking about buying ethanol stocks in a company call Xethanol (XNL). Do you think this is a good idea.
Asked by SESTATES - Fri Aug 24 21:18:02 2007 - - 2 Answers - 0 Comments
A. allwas get some news on the company before you invest in them and as of now 3 out of 5 analyst are saying to sell the stock not to buy. here is some news on them for you... Xethanol Corporation (AMEX: XNL), a renewable energy company, today reported financial results for the three and six months ended June 30, 2007. For the second quarter of 2007, the company reported a net loss of $6.6 million, or ($0.23) per share, as compared to a $5.9 million net loss, or ($0.24) per share, for the same period of the prior year. The increase in the net loss was primarily related to $4.5 million in non-cash charges including a $2.8 million impairment charge on property held for development. For the three months ended June 30, 2007, the weighted… [cont.]
Answered by shawn k - Fri Aug 24 23:48:56 2007
What does ethanol do to the banana sample?
Q. If you are isolating DNA from a banana, how does the DNA separate once you add the ethanol? What is the ethanol doing that makes that happen?
Asked by ims0coolnotreally - Mon Apr 12 20:19:08 2010 - - 1 Answers - 0 Comments
A. Solubility of DNA in a solution means that DNA is able to form electrostatic interactions (Hydrogen bonds) with water molecules, (or rather, water molecules prevent DNA from forming ionic bonds with itself). Ethanol molecules are less polar than water, allowing DNA to form stronger ionic bonds, and thus precipitate out. This precipitate can be collected by pelleting. Refer to links below.
Answered by nightfox - Tue Apr 13 04:28:12 2010
Q. If you are isolating DNA from a banana, how does the DNA separate once you add the ethanol? What is the ethanol doing that makes that happen?
Asked by ims0coolnotreally - Mon Apr 12 20:19:08 2010 - - 1 Answers - 0 Comments
A. Solubility of DNA in a solution means that DNA is able to form electrostatic interactions (Hydrogen bonds) with water molecules, (or rather, water molecules prevent DNA from forming ionic bonds with itself). Ethanol molecules are less polar than water, allowing DNA to form stronger ionic bonds, and thus precipitate out. This precipitate can be collected by pelleting. Refer to links below.
Answered by nightfox - Tue Apr 13 04:28:12 2010
How can i make Ethanol from grain and do i need to modify my car to run on it?
Q. With Gas Prices what they are in Southern California i was thinking about running my car on Pure or next to pure Ethanol, I'm just not exactly sure how to go about doing it. Or if i need to do anything to my car ( i have a 94 Cougar XR7 ) and is there any legal thing I need to worry about because i will be more or less running a distillery. This would be for my personal use, friends' cars and not for drinking so i could use a lower grade of grain.
Asked by headband_nick - Thu May 21 22:30:07 2009 - - 5 Answers - 0 Comments
A. It's easiest to make ethanol from sugar but it takes 10 to 14 lbs of sugar to make one gallon of ethanol. At 20 cents per pound, that's $2 to $2.80 per gallon just for the sugar never mind the energy to keep the mash at the appropriate temperature or the costs involved to distill the ethanol out of the mash. The $20 per gallon value from another poster is probably a good estimate of what it will cost in the end, if you actually took into consideration all of your operating costs which is something enthusiasts always fail to do. To make it from grain, you must keep the mash warm for a much longer period of time or use enzymes. Of course you may be able to get "free" heat perhaps by passive solar and a hot water tank, ideally you… [cont.]
Answered by John W - Fri May 22 14:15:41 2009
Q. With Gas Prices what they are in Southern California i was thinking about running my car on Pure or next to pure Ethanol, I'm just not exactly sure how to go about doing it. Or if i need to do anything to my car ( i have a 94 Cougar XR7 ) and is there any legal thing I need to worry about because i will be more or less running a distillery. This would be for my personal use, friends' cars and not for drinking so i could use a lower grade of grain.
Asked by headband_nick - Thu May 21 22:30:07 2009 - - 5 Answers - 0 Comments
A. It's easiest to make ethanol from sugar but it takes 10 to 14 lbs of sugar to make one gallon of ethanol. At 20 cents per pound, that's $2 to $2.80 per gallon just for the sugar never mind the energy to keep the mash at the appropriate temperature or the costs involved to distill the ethanol out of the mash. The $20 per gallon value from another poster is probably a good estimate of what it will cost in the end, if you actually took into consideration all of your operating costs which is something enthusiasts always fail to do. To make it from grain, you must keep the mash warm for a much longer period of time or use enzymes. Of course you may be able to get "free" heat perhaps by passive solar and a hot water tank, ideally you… [cont.]
Answered by John W - Fri May 22 14:15:41 2009
What is it about ethanol that kills microbes?
Q. I want to understand the chemical reason why ethanol kills microbes. Does it kill both bacteria and viruses and if so why is that?
Asked by tarhousecafe2007 - Fri Sep 11 19:46:47 2009 - - 4 Answers - 0 Comments
A. Ethanol is an alcohol. and Alcohol denatures protein. The cell walls of bacteria and the capsule of viruses are made up of proteins. Thus ethanol disrupts these coverings and making the bacteria and virus unstable and unfit to survive, then dies.
Answered by Kaervek - Fri Sep 11 19:51:23 2009
Q. I want to understand the chemical reason why ethanol kills microbes. Does it kill both bacteria and viruses and if so why is that?
Asked by tarhousecafe2007 - Fri Sep 11 19:46:47 2009 - - 4 Answers - 0 Comments
A. Ethanol is an alcohol. and Alcohol denatures protein. The cell walls of bacteria and the capsule of viruses are made up of proteins. Thus ethanol disrupts these coverings and making the bacteria and virus unstable and unfit to survive, then dies.
Answered by Kaervek - Fri Sep 11 19:51:23 2009
What kinds of renewable materials can make ethanol?
Q. Hello, I am studying ethanol, the most widely used biodiesel made today. Right now, I only know of sugar cane and corn as two type of renewable materials that can produce ethanol. What other things can be used? Thank you.
Asked by Red Letter Day - Tue Sep 9 23:36:15 2008 - - 2 Answers - 0 Comments
A. you can use corn, sugarcane, rice, barley, wheat, sorghum, citrus peel, switchgrass, there are many things you can use. Anything with starch or sugars in it basically. Corn is most widely used (in the states, at least) because it yeilds the most alcohol per bushel for the best price.
Answered by rzarectah - Sat Sep 13 04:20:45 2008
Q. Hello, I am studying ethanol, the most widely used biodiesel made today. Right now, I only know of sugar cane and corn as two type of renewable materials that can produce ethanol. What other things can be used? Thank you.
Asked by Red Letter Day - Tue Sep 9 23:36:15 2008 - - 2 Answers - 0 Comments
A. you can use corn, sugarcane, rice, barley, wheat, sorghum, citrus peel, switchgrass, there are many things you can use. Anything with starch or sugars in it basically. Corn is most widely used (in the states, at least) because it yeilds the most alcohol per bushel for the best price.
Answered by rzarectah - Sat Sep 13 04:20:45 2008
What is the color of leaf after being immersed in ethanol?
Q. This is from experiment of how to determine photosynthetic site in green plants. The leaf is said to be bleached after being immersed in the ethanol, but what is the color?
Asked by rooroorudy - Thu Aug 27 15:43:41 2009 - - 1 Answers - 0 Comments
A. When testing a leaf for starch, it is decolourised in warm ethanol, and turns white.
Answered by Julia_F - Thu Aug 27 18:42:46 2009
Q. This is from experiment of how to determine photosynthetic site in green plants. The leaf is said to be bleached after being immersed in the ethanol, but what is the color?
Asked by rooroorudy - Thu Aug 27 15:43:41 2009 - - 1 Answers - 0 Comments
A. When testing a leaf for starch, it is decolourised in warm ethanol, and turns white.
Answered by Julia_F - Thu Aug 27 18:42:46 2009
From Yahoo Answer Search: 'ethanol'
Thu Jul 29 02:19:37 2010 [ refresh local cache ]
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online.barrons.com
Sat, 24 Jul 2010 10:31:49 GMT+00:00
Barron's Aventine Renewable, one of the top US ethanol producers, has been stung by profit margins that have narrowed to a near-break-even level. ... Smurfit-Stone, LyondellBasell potential winners-Barron's Reuters Africa
hart-isee.com
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in turn would be converted into ethanol The second generation technologies would allow for a wider variety of feedstocks such as grasses wood wood chips straw and agricultural waste Source Renewable Fuels Agency
domesticfuel.com
Cindy Zimmerman
hu, 22 Jul 2010 15:14:52 GM
With the help of Renewable Fuels Association chairman Chris Standlee of Abengoa Bioenergy throwing out the first pitch, the Iowa Cubs beat Oklahoma City RedHawks 8-5 Wednesday night in front of 9088 fans on . Ethanol. Night at Principal ...
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