Is it possible to obtain pure (200-proof) ethanol using fractional distillation from a fermentation mixture that contains equal amounts of water and ethanol?

89,472 results

Organic Chem

Is it possible to obtain pure (200- proof) ethanol using fractional distillation from a fermentation mixture that contains equal amounts of water and ethanol? why or why not?

CHEMISTRY

Is it possible to obtain pure (200-proof) ethanol using fractional distillation from a fermentation mixture that contains equal amounts of water and ethanol? Explain your answer.

CHEMISTRY

Is it possible to obtain pure (200-proof) ethanol using fractional distillation from a fermentation mixture that contains equal amounts of water and ethanol? Explain your answer. I know that some water will still remain i would just like to know why some water vapor will be ...

Chemistry

During fractional distillation of ethanol/water mixture, why can't pure ethanol be obtained (i.e. distillated contains a little water)?

Chemistry

When doing a simple distillation of ethanol-water, is the vapor pure ethanol or does it also contain water? (knowing that ethanol has lower boiling point than water) If it is not pure ethanol, why is it not possible to separate water & ethanol completely? Thanks in advance.

Chem.

Why is it not possible to achieve a complete separation of the ethanol from the water in the clarified reaction mixture via simple distillation? I'm not sure about this because I thought the difference between fractional (what was done) and simple distillation is that ...

Org. Chem.

Why is it not possible to achieve a complete separation of the ethanol from the water in the clarified reaction mixture via simple distillation? I'm not sure about this because I thought the difference between fractional (what was done) and simple distillation is that ...

org. chem.

Why is it not possible to achieve a complete separation of the ethanol from the water in the clarified reaction mixture via simple distillation? I'm not sure about this because I thought the difference between fractional (what was done) and simple distillation is that ...

ochem

Can you suggest some possible reasons for using a mixture of water and ethanol (1:1 mixture H2O/EtOH) as crystallizing solvent rather than using either pure ethanol or pure water?

Organic Chemistry

In order to obtain pure synthetic plant hormone, a 2:1 mixture of water and ethanol is used as the crystallizing solvent. Why is a solvent mixture used? A. Organic compounds are not soluble in pure ethanol. B. Ethanol and water have similar boiling points, so concentration is ...

Chemistry

At room temperature, ethanol's density is 0.789 g/mL while water's density is 0.997 g/mL. When a few milliliters of ethanol are added to water, the two liquids mix. A student is given a unknown liquid at room temperature and experimentally determines its density to be 0.947 g/...

Chemistry

Distillation Scale up: In an experiment 100 lb-mol of 47 lb-mol % ethanol, 53 lb mol % water sol'n is fed into distillation column and separated into two streams: 100lb-mol 0.470 lb-mol ethanol 0.530 lb-mol water goes to: steam 1: 17 lb-mol 0.890 lb-mol Ethanol 0.110 lb-mol ...

Math

a bottle contains 1000ml of pure ethanol. 300 ml is removed and the bottle is topped up with pure water. the mixture is stirred. what is the volume of ethanol in the bottle if the process is repeated five times? how many times should the process be repeated for there to be ...

Science - Chemistry

If vapour pressure of water is 17.5 torr at 20C, what is the water vapour pressure inside a bottle of 100 proof whiskey? 100 proof = 50% ethanol Total volume = 1 L Mass of ethanol = 394.5g Mass of water = 500g Density of ethanol = 0.789g/mL Moles of ethanol = 8.58 mol Moles of...

Chemistry

I did a lab for Organic Chemistry We did a simple distillation of an unknown alcohol to determine the boiling point, which was found to be 74*C The four possibilities for the unknown were methanol, ethanol, 1-propanol and 2-propanol. So from the boiling point the unkown must ...

Chemistry - Please help!!

I did a lab for Organic Chemistry We did a simple distillation of an unknown alcohol to determine the boiling point, which was found to be 74*C The four possibilities for the unknown were methanol, ethanol, 1-propanol and 2-propanol. So from the boiling point the unkown must ...

chemistry

The alcoholic fermentation of350 g/l glucose syrup ceases when the alcoholic degree of the mixture attains 16º (16ml ethanol in 100ml of the solution) Write the reaction of the fermentation reaction. Consider the fermentation of 100L of the glucose syrup. Determine the volume...

chemistry

What is the mass/vol % ethanol in an ethanol-water solution with density of 0.875 g/ml and containing 65.0% ethanol by volume? The density of pure ethanol is 0.789 g/ml.

Chemistry Re-Post Please Help

We did a lab on fractional distillation and I am unsure what the three fractions were. I think the first one is ethanol, and the third one is water, but I'm unsure what the middle one is. Would it be an ethanol/water compound? What do you think it would be? Thanks so uch for ...

Chemistry

We did a lab on fractional distillation and I am unsure what the three fractions were. I think the first one is ethanol, and the third one is water, but I'm unsure what the middle one is. Would it be an ethanol/water compound? What do you think it would be? Thanks so uch for ...

Chemistry

Hydrogren, a possible future fuel, can also be obtained from other compounds such as ethanol. Ethanol can be made from the fermentation of crops, such as corn. How much hydrogen in grams can be obtained from 1.0 kg of ethanol (C2H5OH)?

chemistry

When 25 mL of C2H5OH (density 0.80 g.cm-3) is dissolved in water to prepare a 250 mL solution, the density of the solution was found to be 0.950 g.cm-3. Calculate a. Molarity of pure ethanol; b. Molarity of ethanol in the final solution; c. Volume of the final solution which ...

CHEMISTRY

ETHANOL (C2H5OH) HAS A DENSITY OF 0.80g/ml. IF A 10%(v/v) MIXTURE OF ETHANOL IN WATER WAS PREPARED HOW MANY GRAMS OF ETHANOL WOULD BE IN 100ML OF THE MIXTURE? (ASSUMING MIXED VOLUME IS THE SUM OF THE PARTIAL VOLUME)

Chemistry

During a fractional distillation of a 25mL ethanol/H2O soln, it was found that first the temperature stayed constant at ~75 C for 3mL of soln, then it went up to 100 C for the rest of the soln. The first question is: Assuming that the unknown (ethanol) did not form an ...

Chemistry

In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. A) Using C6H12O6 for sugar, calculate ÄH of fermentation and of respiration(combustion). B) Write a...

Chemistry

What is the mass/ vol% ethanol in an ethanol water solution with density of 0.875g/ml and containing 65% ethanol by volume? The density of pure ethanol is 0.789g/ml? My calculation 0.875g/ml x 1000ml x 0.65/ 46.06 = 12.34m 12.34/0.789g = 15.6g I am not sure answer. Pls help

chemistry

What is an example of a specific mixture that could be separated with simple distillation and a specific mixture for which only fractional distillation would be used? I think a methanol-water mixture could be done with simple distillation, since they have b.p which are further...

Chemistry

In winemaking, the sugars in grapes undergo fermentationby yeast to yield CH3CH2OH and CO2. During cellularrespiration, sugar and enthanol are "burned" to water vapor andCO2. A) Using C6H12O6 for sugar, calculate ÄH of fermentation and of respiration(combustion). B) Write a ...

Biology

What fermentation products are made by both yeast and humans? Which product of fermentation is made by both humans and yeast? a. Ethanol b. CO2 c. NAD+ d. NADH In humans, lactic acid fermentation happens resulting in lactate, while the product of yeast fermentation is ethanol...

chemistry

In winemaking, the sugars in grapes undergo fermentationby yeast to yield CH3CH2OH and CO2. During cellularrespiration, sugar and enthanol are "burned" to water vapor andCO2. A) Using C6H12O6 for sugar, calculate ÄH of fermentation and of respiration(combustion). B) Write a ...

chem

drbob you helped me with this problem the other day but i have a question. -i changed 500mL of ethanol to grams then to mol. i was wondering if i then used 1000mL or 500mL of water to change to kg? The "proof" of an alcoholic beverage is twice the volume percent of ethanol, ...

Org. Chem.

When sucrose is fermented to produce ethanol why is it not possible to obtain a final solution containing more than 10-15% ethanol? Does this have to do with azeotropes? However, I thought this was possible? I am confused, please help.

org. chem.

When sucrose is fermented to produce ethanol why is it not possible to obtain a final solution containing more than 10-15% ethanol? Does this have to do with azeotropes? However, I thought this was possible? I am confused, please help.

ORGANIC CHEMISTRY

NAME THE PROCESSES OR TECHNIQUES IN THE FOLLOWING. 1.SEPARATION OF A SOLID FROM A SOLUTION 2.WHEN WATER IS COLD TO FORM ICE 3.WHEN WATER IS BOIL TO FORM VAPOR 4.WHEN IODINE IS HEATED DIRECTLY TO FORM GAS WITHOUT BEING LIQUID 5.WHEN STEAM IS COLD TO FORM WATER 6.WHEN TWO ...

chem

Does anyone know what graph you would obtain if the fractional distillation had been a complete separation of pure toluene or pure cyclohexane?

CHEMISTRY STOICHIOMETRY!!!!!!!!

AN an antacid tablet contains 0.1g of magnesium hydrocarbonate, what nass of stomach acid, HCL, will it neutralise? Wine is made by the fermentation of the sugar in grapes. Surose-> Ethanol+Carbondioxide. Whta massof ethanol can be obtained from 6.00kg of sucrose?

Chemistry *DrBob222

Posted by Jamie on Sunday, June 20, 2010 at 3:36pm. You are given three test tubes that contain colourless liquid. One test tube contains benzene, another contains ethanol, and the third contains 2,4-hexadiene. Design a procedure that will tell you the contents of each test ...

chemistry

Shown below is a schematic representation of the water-ethanol phase diagram. Making reference to the phase diagram, explain in a few sentences how one could enrich a solution of 15 percent ethanol - 85 percent water to a composition of 60 percent ethanol - 40 percent water. ...

chemistry

You have a solution that contains 340ml of water and 20ml of ethanol. Find the concentration of ethanol in this solution in each of the following units: (density of water is 1.00 g/ml, density of ethanol is 0.789g/ml)

Chemistry-please help!

When sucrose is fermented to produce ethanol why is it not possible to obtain a final solution containing more than 10-15% ethanol? Does this have to do with azeotropes? However, I thought this was possible? I am confused, please help.

Chemistry-please help!

When sucrose is fermented to produce ethanol why is it not possible to obtain a final solution containing more than 10-15% ethanol? Does this have to do with azeotropes? However, I thought this was possible? I am confused, please help.

science(chem)

I'm making different concentrations of ethanol and I just wanted to check my calculations and method. Making ethanol concentrations of: 0.40% 0.30% 0.20% 0.10% 0.05% To make the 0.40% ethanol from stock solution using 100ml volumetric flask: (xg ethanol)/(100ml) x 100= 0.40% ...

Chemistry

I did a lab for Organic Chemistry I did a simple distillation for an unknown and found that it boiled at 76 degrees. I also found out that the unknown was ethanol since we knew what the 4 possibilities were and mine was closest to ethanol. I also did a fractional distillation ...

chemistry

what mass of ethanol could form from fermentation of 90.0g of glucose? what is the percentage yield if 6.0g of ethanol forms?

Water solubility chemistry

What solvent that would dissolve Ethanol in water? You mean selectively dissolve the ethanol out of the water? Ethanol is soluble in water, at least last night when I had wine, it was dissolved. I don't know of anything that selectively absorbes ethanol when dissolved in water.

chem

The "proof" of an alcoholic beverage is twice the volume percent of ethanol, C2H5OH, in water. The density of ethanol is 0.789g/mL and that of water is 1.99g/mL. A bottle of 100-proof rum is left outside on a cold winter day. a) Will the rum freeze if the temperature drops to...

Organic CHEM

What is the whole point of using solvent pairs for recrystallization(say a mix of ethanol and water) rather than just using one or the other? -I know that you use solvent pairs when you solute won't dissolve in either pure water or pure ethanol, but then if the solute won't ...

Chemistry

In winemaking, the sugars in grapes undergo fermentationby yeast to yield CH3CH2OH and CO2. During cellularrespiration, sugar and enthanol are "burned" to water vapor andCO2. A) Using C6H12O6 for sugar, calculate ÄH of fermentation and of respiration(combustion). B) Write a ...

chemistry

describe how one can obtain pure oxygen by fractional distillation of liquedfied air

cheistry

Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less. What part of fractional distillation apparatus makes it efficient and possess an advantage over a simple distillation process. Explain using a diagram.

Chemistry

In winemaking, the sugars in grapes undergo fermentationby yeast to yield CH3CH2OH and CO2. During cellularrespiration, sugar and enthanol are "burned" to water vapor andCO2. A) Using C6H12O6 for sugar, calculate ÄH of fermentation and of respiration(combustion). B) Write a ...

chemistry

In winemaking, the sugars in grapes undergo fermentationby yeast to yield CH3CH2OH and CO2. During cellularrespiration, sugar and enthanol are "burned" to water vapor andCO2. A) Using C6H12O6 for sugar, calculate ÄH of fermentation and of respiration(combustion). B) Write a ...

chemistry

In winemaking, the sugars in grapes undergo fermentationby yeast to yield CH3CH2OH and CO2. During cellularrespiration, sugar and enthanol are "burned" to water vapor andCO2. A) Using C6H12O6 for sugar, calculate ÄH of fermentation and of respiration(combustion). B) Write a ...

Chemistry #11

A solution of ethanol (C2H5OH) is prepared by dissolving 35.0 ml of ethanol in enough water to make 120.0 ml of solution. What is the molarity of the ethanol in this solution? 46.07 g= molar mass of ethanol .079 g/ml=density

Science

Assume you can heat water with perfect insulation (all the heat from combustion of ethanol is transferred to water). What is the volume of ethanol required to heat 100 mL of water by 10 degrees C? (You will need to look up density of ethanol, specific heat capacity or water, ...

Chemistry

At 20.0°C the vapour pressure of pure methanol is 11.8 kPa and that of pure ethanol is 5.93 kPa. A gaseous mixture of methanol and ethanol is cooled and compressed until the first drops of liquid form at 20.0°C and a total pressure of 10.0 kPa. Assuming the liquid mixture ...

chem

calculate the number of grams of alcohol present in 1.70 L OF 75-Proof gin. The density of ethanol is 0.798 g/ml. Proof--> twice the % by volume of ethanol(C2H5OH) present.

Science

How many mL of 80% v/v ethanol do you need to make 200 mL of a 50% ethanol solution in water?

Chemistry

In winemaking, the sugars in grapes undergo fermentationby yeast to yield CH3CH2OH and CO2. During cellularrespiration, sugar and enthanol are "burned" to water vapor andCO2. A) Using C6H12O6 for sugar, calculate ÄH of fermentation and of respiration(combustion). B) Write a ...

math

A dealer has 10,000 gallons of unleaded gasoline. He wants to add just enough ethanol to make the fuel a 10% ethanol mixture. How many gallons of ethanol should be added?

chemistry

The fermentation of glucose to form ethanol occurs according to the following chemical reaction: C6H12O6(aq) → 2 C2H5OH(l) + 2 CO2(g) A) If 700 grams of glucose (C6H12O6) are fermented, what is the maximum volume in milliliters of ethanol (C2H5OH) that can form? (Density of ...

Chemistry-Urgent

What is the percent by volume of ethanol in a solution that contains 26 mL of ethanol dissolved in 113 mL of water? explain please

Chemistry

This question looks at the relationship between the molecular structure, polarity and solubility of ethanol (wikipedia ethanol), water and petrol (Wikipedia Petroleum). This posting was made on a discussion board: "Ethanol mixs in fuel are not a bad thing if pure. What they ...

chemistry

If 40.0 g of water at 70 degrees C is mixed with 40.0 g of ethanol at 10.0 degrees C, what is the final temperature of the mixture? How does one go about solving this problem? I found the specific heat of water and ethanol, but now what?

math

a certain automobile gas tank contains15 gallons 12% which is ethanol how much gasoline should be removed so that when replaced with pure ethanol there is 22% ethanol in gas tank?

OChem

A solution consisting of water and ethanol is found to have a refractive index of 1.3541 at 20 degrees C. The refractive indices at 20 degrees C of water and ethanol are 1.3330 and 1.3610, respectively. Determine the molar composition (in percent) of the mixture by assuming a ...

Chemistry

The heat energy of ethanol is 29800J/g. A 355g can of beer contains 3.70% ethanol by mass. How many ethanol calories are in a can of beer?

AP Chemistry

A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.

Chemistry

A bottle of wine contains 11.4% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.

Organic Chemistry

Sorry about the first posted request. The question has to do with the fermentation of ethanol from sucrose Please revisit the question and assist if possible. Thanks for your assistance. How does acetaldehyde impurity arise in the fermentation?

CHEMISTRY

You mix 40.0 g of ethanol (C2H5OH, molecular weight = 46.1 g/mol) and 60.0 g of water (molecular weight = 18.0 g/mol) The resulting solution has a density of 920 g/L. a)Calculate the molarity of ethanol in this solution? Answer : 0.06 kg of H2O This is correct. b) At what ...

chemistry

At room temperature , the density of water is 1 g/ml and the density of ethanol is 0.789 g/ml . What volume of ethanol contains the same no. of molecules as are present in 175 ml of water?

o-chem

Explain whether or not each of the following pairs of solvents might be useful as a solvent pair for recrystallization. (a) ethanol-methanol (b) hexane-cyclohexane (c) acetone-ethanol (d) water-ethanol (e) water-cyclohexane

Organic Chemistry

Explain whether or not each of the following pairs of solvents might be useful as a solvent pair for recrystallization. (a) ethanol-methanol (b) hexane-cyclohexane (c) acetone-ethanol (d) water-ethanol (e) water-cyclohexane

Chemistry -repost thank you in advance

I have a bottle of 95% ethanol purchased from the manufacturer. Normally, when it is not stated, does it mean 95% w/w ethanol? I need to prepare 100ml of 40% v/v ethanol solution from 95% ethanol. Please show me the calculation steps. Thanks.

Azeotrope

I'm having trouble understanding what an azeotrope is. Any clarification is appreciated. Sheryl Two liquids with different boiling points normally can be separated by fractional distillation; i.e., the lower boiling point material boils first and when all of it has been ...

chem - instrumental analysis

A stock solution of ethanol is made by weighing out the correct amount of absolute ethanol in a tared beaker containing 15 ml of water. Why is it necessary to add water to the beaker before adding the ethanol?

Chemistry

Alcoholic drinks contain ethanol. 10cm3 of ethanol is called one unit of alcohol. Men are advised to drink a maximum of 21 units of ethanol a week, while women are advised to drink a maximum of 14 units. Wine contains about 14% ethanol by volume. A) a bottle of wine contains ...

chemistry

Please help =) 59. Ethanol, C2H5OH, is responsible for the effects of intoxication felt after drinking alcoholic beverages. When ethanol burns in oxygen, carbon dioxide and water produced. (a) Write a balanced equation for the reaction. [[Think I did this right] Need help with...

Chemistry

In an experiment we did in class ethanol was poured into a test tube and we noticed that the ethanol did not collect and form a dome at the opening of the tube in the same way that water had. I know why water collected at the opening, but i'm not sure why the ethanol didn't ...

Chemistry

Describe how one would obtain the stated pure product from the following mixtures and assume that this cannot be achieved simply by distillation of the original mixture: 1. benzoic acid from a mixture with ammonium benzoate 2. phenylamine from a mixture with nitrobenzene, HCl ...

chemistry

A solution of ethanol (C2H50H) in water is prepared by dissolving 76.9ml of ethanol (density0.79g/cm3) in enough water to make 0.25L of solution. What is the molarity of ethanol in this solution Who helps me

Chemistry

Ethanol is the active ingredient of alcoholic beverages. It is also s a possible replacement for gasoline. The complete combustion of ethanol forms carbon dioxide and water. CH3CH2OH + O2 => CO2 + H2O Balance the equation. What mass of carbon dioxide is formed by the ...

chemistry

A classic experiment in equilibrium studies dating from 1862 involved the reaction in solution of ethanol and acetic acid to produce ethyl acetate and water. The reaction can be followed by analyzing the equilibrium mixture for its acetic acid content. In one experiment, a ...

Chemistry

Assuming the solution you used was 95% ethanol by volume and that the density of ethanol is 0.816g/mL, how much water and carbon dioxide are produced in the experiment? Equation: C2H6O+3O2-->2CO2+3H2O (You start off with 2.0 mL of ethanol)

chemistry

A solution of ethanol, C2H5OH, is prepared by dissolving 25.0 mL of ethanol in enough water to give a total volume of 250.0 mL. What is the percent-by-volume concentration of ethanol?

Chemistry- urgent help needed

How do I prepare 40% v/v from 95% ethanol? When we say 95% ethanol, do we usually mean 95% w/w ethanol unless otherwise stated? Please show me the calculation steps to prepare 40% v/v from 95% w/w ethanol. Thanks.

chem

A solution of ethanol (C2H5OH) in water is prepared by dissolving 57.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 240.0 mL of solution. What is the molarity of the ethanol in this solution?

Chemistry

A solution of ethanol (C2H5OH) in water is prepared by dissolving 61.9 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?

science

Given that 6.20 x 10^23 ethanol molecules have a mass of 46.04g calculate the number of ethanol molecules in a film of ethanol that is 3.08 mm by 0.0015 mm. Assume the density of ethanol is 0.790 g/mL please helppp

Science

Explain a possible way to separate a mixture of water, ethanol, and sand?

Chemistry II

A solution of ethanol in water is prepared by dissolving 61.0 mL of ethanol (density = 0.79g/mL) in enough water to make 280.0 mL of solution. What is the molarity of the ethanol in this solution? definition of molarity = #mols/L. mass ethanol = m = volume x density = 61.0 mL ...

Chemistry

A solution of ethanol (C2H5OH) in water is prepared by dissolving 76.9 mL of ethanol (density 0.79 g/cm^3) in enough water to make .250 L of solution. What is the molarity of ethanol in this solution?

math

the ratio of gas to ethanol is 17 to 3, how much ethanol is in 600 gallons of mixture

chemistry

Why is it wise to clean the aluminum? Why is the reaction done in the hood? Why must suspended solids be removed from the basic solution? Why is an ethanol-water mixture, rather than pure water, used to wash the collected alum?

chemistry

a mixture is prepared using equal masses of two volatile liquid benzene, C6H6 and ethanol C2H5OH. what is the mole fraction of benzene in this mixture?

chemistry

HELPPPP!!!! A mixture is prepared using equal masses of the two volatile liquids benzene, C6H6, and ethanol, C2H5OH. What is the mole fraction of benzene in this mixture?

ochem

If you recrystallize a compound with a 1/2 ethanol/water mixture and water remains in the compound after recrystallization, would that change the melting range of the pure compound?

CHEMISTRY

An ethanol-water solution is prepared by dissolving 10.00 ml ethanol C2H5OH (density=0.789g/ml) in sufficient water to produce 100.00 ml of solution with a density of 0.982g/ml. What is the concentration of ethanol in this solution? Expressed as ml. a.)%volume b.)%mass c.)%m/v...

science

Specific heat capacity of solid ethanol is 2.419 J/g C. Melting point temperature of ethanol is -114.4 C/ 158.8 K. Enthalpy of fusion of ethanol is 106.4 J/g. Specific heat capacity of liquid ethanol is 2.440 J/g C. 44.0 g of solid ethanol at -134.4 C is dropped into a Dewar ...

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