March 28, 2017

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You are given 350 mL a stock solution of 1.66E-02 M benzoic acid, MW = 122.125 g/mol.
Answer the following questions.

A. What is the number of moles present in the original stock solution?
B. You need to dilute the benzoic acid stock solution to 1.24E-03 M. If you need 455 mL of solution,
what volume of the original stock solution do you need to dilute?
C. What is the number of moles present in the new diluted solution?
D. You mass the solution to be 462.131 g. What is the density of the solution?
E. If the actual density should be 1.05 g/mL. What is your percent error?

  • Chemistry Lab - ,

    It helps us if you keep to the same screen name.
    A. moles = M x L
    B. mL x M = mL x M
    C. see B.
    D. density = mass/volume
    E. [(your value-1.05)/1.05]*100 = ??

  • Chemistry Lab--correction - ,

    C. moles = M x L.

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