organic chem

posted by .

A student's correctly calculated value for the percent recovery of the purified unknown solid in a recrystallization experiment was 102%. Assume that the student performed all steps of the procedure correctly

a) comment of the validity of this result; include reasons

b) suggest possible explanation for such a result

  • organic chem -

    Either the student witnessed a miracle, or a measurement error occurred. I would suspect the latter.

  • organic chem -

    Another possibility is that the measurements were ok but the product contained some of the impurity or some of the solvent.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    A student performed the freezing point depression experiment according to directions but mistakenly recorded the mass of lauric acid as 8.300g instead of8.003g. The calculated molar mass of the unknown acid will be GREATER/LESS than …
  2. Science

    So a crystallization experiment was performed using an impure sample of biphenly, it weights 0.5g and contains about 5% impurity. Benzene is used as the solvent but after crystallization only about 0.02g were found. If everything was …
  3. chemistry

    (A) A student performed the freezing point depression experiment according to directions but mistakenly recorded the mass of lauric acid as 8.300 g instead of 8.003 g. The calculated molar mass of the unknown acid will be ___________ …
  4. chemistry

    A) A student performed the freezing point depression experiment according to directions but mistakenly recorded the mass of lauric acid as 8.300 g instead of 8.003 g. The calculated molar mass of the unknown acid will be ___________ …
  5. Chemistry

    A student performs a crystallization on an impure sample of biphenyl. The sample weighs 0.5 g and contains about 5% impurity. Based on his knowledge of solubility the student decides to use benzene as the solvent. After crystallization, …
  6. organic chemistry

    recrystallization question: a student's correctly calculated value for the % recovery of purified unknown solid was 102%. assume that the student performed all steps of procedure correctly. a) comment on the validity of the result …
  7. Organic Chemistry

    A student purified a 3.88 g sample of phthalic acid by recrystallization from water. The published solubility of phthalic acid in 100 mL of water is 0.54 g at 14ºC and 18 g at 99ºC. What is the smallest volume (in milliliters) of …
  8. Chemistry

    A chemist conducted a recrystallization on 18.5 g of a solid and collected 12.5 g from the first, and 2.7 g from the second recrystallization. Show your calculation and answer the following questions: What is the percent recovery in …
  9. Chemistry 20

    A student was experimentally checking the stoichiometry of a reaction. The student correctly predicted that the reaction should produce 1.82 g of al2(so4)3(s). When the student dried and weighed the al2(so4)3(s) produced, its mass …
  10. organic chemistry

    1. A chemist conducted a recrystallization on 18.5 g of a solid and collected 11.2 g as a first crop. She re-cooled the mother liquor and obtained 2.1 g as a second crop. Show your calculation when answering the following questions: …

More Similar Questions