Stoichiometry, find the mass of the product

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The discussion centers on calculating the theoretical mass of ester produced from the reaction of salicylic acid with excess methanol. Given the molar masses and a 1:1:1 mole ratio, the calculation shows that 1.20 grams of salicylic acid yields approximately 1.32 grams of methyl salicylate. Participants confirm the correctness of the calculations and clarify that using excess reagent does not alter the expected mass of the product. The consensus is that the method used is appropriate for determining the theoretical yield. The final expected mass of the ester is 1.32 grams.
SelenaT
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Homework Statement



[/B]
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
1:1:1

Homework Equations

3. The Attempt at a Solution
[/B]

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?
 
Physics news on Phys.org
Looks good. Any reason to suspect "xs" would change your result?
 

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