Stoichiometry, find the mass of the product

In summary, using a mole ratio of 1:1:1, 1.20 grams of salicylic acid (with a molar mass of 138.13g/mol) reacted with excess methanol (with a molar mass of 32.05g/mol) would theoretically produce 1.32 grams of ester (methyl salicylate) with a molar mass of 152.16g/mol. There is no need to account for excess reagent in this calculation.
  • #1
SelenaT
12
0

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?
 
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  • #2
Looks good. Any reason to suspect "xs" would change your result?
 

1. What is stoichiometry?

Stoichiometry is a branch of chemistry that deals with the calculation of the quantities of reactants and products in a chemical reaction.

2. How do you find the mass of the product in stoichiometry?

To find the mass of the product in stoichiometry, you need to first balance the chemical equation, determine the mole ratio between the reactant and the product, and then use the mole ratio to calculate the mass of the product.

3. What is the importance of stoichiometry in chemistry?

Stoichiometry is important in chemistry because it helps us understand and predict the outcome of chemical reactions. It also allows us to determine the amount of reactants needed to produce a desired amount of product.

4. What are the key concepts in stoichiometry?

The key concepts in stoichiometry include balancing chemical equations, determining mole ratios, and using dimensional analysis to convert between units of measurement.

5. Can stoichiometry be used in real-life applications?

Yes, stoichiometry is used in many real-life applications, such as in the production of fertilizers, medications, and cleaning products. It is also used in environmental studies to calculate the amounts of pollutants produced in chemical reactions.

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