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Homework Help: Stoichiometry, find the mass of the product

  1. Sep 30, 2015 #1
    1. The problem statement, all variables and given/known data

    If 1.20 grams of salicylic acid is reacted with excess methanol, what mass of ester should you expect to achieve theoretically?

    Molar masses of..
    salicylic acid is 138.13g/mol
    methanol is 32.05g/mol
    ester (methyl salicylate) is 152.16g/mol

    Mole ratio

    2. Relevant equations

    3. The attempt at a solution

    1. 1.20 g salicylic acid (1 mol salicylic acid/138.13 g salicylic acid) = 0.008687468 mol salicylic acid

    2. 0.008687468 mol salicylic acid (1 mol ester/1 mol salicylic acid) = 0.008687468 mol ester

    3. 0.008687468 mol ester (152.16 g ester/1 mol ester) = 1.32 g ester

    so 1.32g of ester would be expected.

    Is my work correct? or do I have to use the excess reagent to find the mass of the product?
  2. jcsd
  3. Sep 30, 2015 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Looks good. Any reason to suspect "xs" would change your result?
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