Chemistry

A person’s blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasma with a potassium dichromate solution. The balance is

16H+ (aq) + 2Cr2O72- (aq) + C2H5OH (aq) 4Cr3+ (aq) + 2CO2 (g) + 11H2O (l)

If 35.46 mL of 0.05961 M Cr2O72- is required to titrate 30.50 g of plasma, What is the mass percent of alcohol in the blood?

__________ mass %

40 mL mass % Alcohol in blood = mass alcohol/ mass blood
0.06 M

  1. 👍
  2. 👎
  3. 👁
  1. mols Cr2O7^2- = M x L = ?
    Convert to mols C2H5OH by
    ?mols Cr2O7^2- x (1 mol C2H5OH/2 mol Cr2O6^2-) = ?mols Cr2O7^2- x 1/2 = ?
    Then grams ethanol = mols ethanol x molar mass ethanol
    %w/w = (mass ethanol/mass sample)*100 = ?
    mass ethanol from above.
    mass sample is 30.50 g from the problem.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. BIOLOGY

    Heat exhaustion caused by a person's exposure to heat can result in weakness or collapse. It usually involves a decrease in blood pressure. Explain why the homeostasis adjustment to heat can cause a drop in blood pressure.

  2. algebra

    Medical research indicates that the risk of having a car accident increases exponentially as the concentration of alcohol in the blood increases. The risk is modeled by R=6e^12.77x Where x is the blood alcohol concentration and R,

  3. helth plz help

    the blood vessels that carry blood away from the heart to the rest of the body are… plasma ****** red blood cells whight blood cells platelets 4.Which component of blood is used to help create a scab after you cut your finger?

  4. Chemistry

    Alcohol levels in blood can be determined by a redox titration with potassium dichromate according to the balanced equation: C2H5OH(aq) +2Cr2O7-2 (aq) + 16H+(aq)---> 2CO2 (g) + 4 Cr3+ (aq) + 11H2O (l) What is the blood alcohol

  1. alcoholic beverages

    Which of the following statements about alcohol is correct? A. Mixing different kinds of alcoholic beverages increases the rate of intoxication. B. Men and women metabolize alcohol at different rates. C. The higher the level of

  2. Science

    a biologist diluted a blood sample with distilled water. While observing the sample with a microscope, she noted that the red blood cells had burst. This bursting is most likely the result of which process?

  3. Science/Health

    2. Which of the following explains why the heart is organized so that it pumps blood to two different locations? A. to supply blood to two different sides of the body B. to allow a way for the blood to pick up new blood cells C.

  4. math/ algebra?

    a lab technician draws a sample of blood. A cubic millitmeter of the blood contains 22^3 white blood cells and 22^5 red blood cells. What is the ratio of white blood cells to red blood cells?

  1. science

    2. Which of the following is responsible for carrying nutrients to and waste from the body’s cells? (1 point) plasma red blood cells red and white blood cells white blood cells 3. _________ defend the body against disease. (1

  2. chemistry

    Laws passed in some states define a drunk driver as one who drives with a blood alcohol level of 0.08% by mass or higher. the level of alocohol can be determinded byt titrating blood plasma with pottasium dichromate according to

  3. s

    2. Which of the following explains why the heart is organized so that it pumps blood to two different locations? (1 point) to supply blood to two different sides of the body to allow a way for the blood to pick up new blood cells

  4. Biology

    Codominance is a form of inheritance in which two different alleles for a gene are both expressed, and neither allele is dominant over the other. The alleles for type A blood and type B blood are codominant. If a man who is

You can view more similar questions or ask a new question.