Esterification Reaction | MCQs

Explanation

• First, we calculate the number of moles of acetic acid used:

Number of moles of acetic acid = mass of acetic acid / molar mass of acetic acid

Number of moles of acetic acid = 30 g / 60 g/mol = 0.5 moles

Since the reaction is 1:1 between acetic acid and ethyl acetate, the number of moles of ethyl acetate produced is also 0.5 moles.

• Now, we can calculate the theoretical yield of ethyl acetate:

Theoretical yield of ethyl acetate = number of moles of ethyl acetate * molar mass of ethyl acetate

Theoretical yield of ethyl acetate = 0.5 moles * 88 g/mol = 44 grams

• Now, we can calculate the percentage yield:

Percentage yield = (actual yield / theoretical yield) * 100%

Percentage yield = (40 g / 44 g) * 100%

Percentage yield ≈ 90.9%

So, the percentage yield of the ester is approximately 90.9%.