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13 Dec 2019

A 12 fl oz can of Coors Light is labeled as having 4.2% alcoholcontent. (note this is % volume, also written as v/v%). Consideringthat ethanol (C2H60) is the alcohol used, what is the molarity ofethanol in one can.

(1 fl oz = 28.4 ml) (density of ethanol = 0.789 g/ml)

the anwer is 0.720 M. please show work. thanks.

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** 2 Parts** A blood concentration of .250% of ethanol C2H5OH can induce unconsciousness. In the US a 12 fluid ounce glass of beer containing 5.00% of ethanol is considered to be 1 standard drink.

A) How many glasses of beer would a man with a blood volume of 6.10 L have to drink in order to deliver .250% alcohol into the blood?

B) Explain why the man does not actually become unconsciius by drinking this amount of beer.

*** PLease show work so I can follow set-up to solution. Thanks!!**

Info:

Density of C2H5OH: 0.789 g/cm3

1 fl oz = 29.57 mL

1 cm3 = 1 mL

MW of C2H5OH = 46.0 g/mol

Inorganic questions--please show work and only answer if you truly understand it:

Please show all work and answers on this page if at all possible.

6. The alcohol content of hard liquor is normally given in terms of the âproofâ, which is defined as twice the percentage by volume of ethanol (C₂H_Â5OH) present. Calculate the number of grams of alcohol present in a glass of of 75-proof gin (assume a 4 oz glass). The density of ethanol is 0.798 g/mL.

7. You find a solution on the shelf that is labeled 30% NH₃ (aq). The density of the solution is 0.982 g/mL. Calculate the following:

a) mole fraction of ammonia = ____________

b) molality of ammonia = ____________

c) molarity of ammonia = ____________

8. Adrenaline is the hormone that triggers release of extra glucose molecules in times of stress or emergency. A solution of 0.64 g of adrenaline in 36.0 g of CCl₄causes an elevation of 0.49ËC in the boiling point. Given that the k_b for CCl₄ is 5.02 C/m, what is the molecular mass of adrenaline.

9. The Henry's Law constant for the solubility of nitrogen in water is 6.40x10^-4M/atm at 25.0 Celsius. At 570 torr, how many grams of N₂ can be dissolved in 250 L of water at 25.0 degrees Celsius

10. What is the osmotic pressure of a 1.36 M aqueous solution of urea [(NH₂)₂CO)] at 22.0ËC ?

Using this information: I used 4.00 g potassium dichromate. The amount of Iron ll is 4.00 gram in 2nd flask. Used grey moose vodka 2.00 ml and filled flask with water. This was the 2% vodka solution. For the experiment I used 5.00ml of the vodka and added 35.00 ml of more water to make it 1/8 of 2% or 0.25% of the original. With this information and the answer's i have placed in the table please help with remainder of questions. Need to work to understand answers so I will get correct on upcoming test. Thanks.

Calculate the concentration of the dichromate ion in the first volumetric flask.

Calculate the concentration of the iron (II) ion in the second volumetric flask.

Experiment 2: Titrate the Vodka Sample

Lab Results

Record the following lab data in the table below. If you had to repeat one of the titrations, disregard the value that was different.

(a) volume of potassium dichromate solution added to the Erlenmeyer flask in mL	5.00ml
(b) coarse titration volume of iron (II) solution range in mL	14.10 -14.15 ml
(c) volume of iron (II) solution delivered from the burette in mL during the first fine titration	14.13ml
(d) volume of iron (II) solution delivered from the burette in mL during the second fine titration	14.11ml
(e) average volume of iron (II) solution used in the fine titrations	14.12ml
(f) the color of the analyte solution at the end point of the titration	purple
(g) the color of the analyte solution after adding the indicator	dark green

Data Analysis

Record and calculate the quantities in the table below using the data from your dichromate titrations. Use an average value for the volume of iron (II) solution used in the titration. If one of your values is very different, and you had to perform the titration three times, disregard the value that was very different when computing the average.

(a) volume of potassium dichromate solution added to the Erlenmeyer flask in mL 5.00ml
(b) moles of dichromate ion added to the Erlenmeyer flask
(c) average volume of iron (II) solution delivered from the burette in mL 14.12ml
(d) moles of iron (II) ions delivered from the burette
(e) moles of excess dichromate ions that reacted with the iron (II) ions (remember that the ratio in which they react is 1 dichromate : 6 iron (II))
(f) moles of dichromate that reacted with the ethanol in the vodka (Subtract excess dichromate ions that reacted with the iron (II) ions from the original moles of dichromate ion present.)
(g) moles of ethanol in the 5 mL diluted vodka sample according to the stoichiometric ratio of 2 dichromate ions to 3 ethanol molecules

The amount of alcohol in a drink is typically reported as percent alcohol by volume. Volume percent or volume/volume percent (% v/v) most often is used when preparing solutions of liquids. Volume percent is defined as:
% v/v = V_solute/V_solution Ã 100
Find the percent alcohol (ethanol) by volume for the vodka used in the lab by following the steps outlined in the table below.

(a) given the molar mass of ethanol of 46.07 g/mol, calculate the mass of alcohol (ethanol) in the tested sample solution
(b) given the density of ethanol of 0.7893g/ml, find the volume in mL of ethanol present in the diluted vodka solution
(c) record the volume of vodka used in the experiment in mL
(d) find the percent alcohol by volume (% v/v) in the diluted vodka solution
(e) the diluted vodka solution was prepared by diluting 2.00 mL vodka to 100.00 mL. Calculate the dilution factor used (N:1)
(f) multiply the percent alcohol by volume in the diluted vodka solution by the dilution factor to obtain the % v/v alcohol in the original vodka solution

Conclusions

The Grey Moose vodka tested in this lab reports a percent alcohol by volume of 40.0% on its label. How does your value compare to the reported one? If the values are different, give one possible experimental error that might have contributed to the difference.

Potassium permanganate is another strong oxidizing substance similar to potassium dichromate. An acidic solution of purple permanganate ions can get reduced to colorless Mn²⁺ ions in the presence of ethanol. Write down the redox reaction between permanganate and ethanol, and balance it using the half-reaction method.

Besides vodka, there are other colorless alcohol-containing beverages that can be titrated following the procedure in your lab. Given the average values for the percent alcohol by volume listed in the table below, which beverage do you expect to use the least amount of iron (II) standard solution during the titration? Assume all lab procedures stay the same.

	% alcohol by volume
White rum	37.0%
Vermouth	18.0%
White whine	12.0%

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