chemistry

posted by .

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 the unbalanced redox reaction.

igot the balanced equation--

C2O72- + 14 H + 3H2O + C2H5OH ---> 2cr3+ + 7H2O + 2CO2 + 6H

-- assuming that the only substance that reacts with the dichromate in blood plasma is alcohol, is a person legally drunk if 38.94 ML of 0.0723M potassium dichromate is required to titrate 50.0 g sample of blood plasma?

HELP ME PLZ.. THIS IS FOR A GRADE.. THANKYOU! :)

  • chemistry -

    Check your equation. I don't think it is balanced. I see 26 H atoms on the left and 20 on the right.
    Step 1. moles dichromate = M x L
    Step 2. Convert moles dichromate to moles alcohol using the coefficients in the balanced equation.(I think you need to start with 2Cr2O7^-2.
    Step 3. Convert moles alcohol to grams alcohol.
    Step 4. % ethanol = (g alcohol/50)*100=??

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    I got this question wrong, and I'm not sure where my mistakes lie. Can someone show me what I'm not doing right and what the correct answers should be?
  2. 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 …
  3. college chemistry MEASURMENTS

    some states have reduced the legal limit for alcohol sobriety from 0.10% to 0.08% alcohol by volume in blood plasma. a) how many mL of alcohol are in 3.0 qt of blood plasma at the lower legal limit?
  4. math

    After several drinks, a person has a blood alcohol level of 200 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol …
  5. math

    After several drinks, a person has a blood alcohol level of 200 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol …
  6. math

    After several drinks, a person has a blood alcohol level of 200 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol …
  7. math

    After several drinks, a person has a blood alcohol level of 200 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol …
  8. 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 level …
  9. math

    After several drinks, a person has a blood alcohol level of 220 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol …
  10. 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 …

More Similar Questions