Question

A reaction of 10.50 g of 1,2-diphenylethane-1,2-dione with conc. NaOH followed by aqueous acidic work-up furnished 8.55 g of a carboxylic acid. The yield of the carboxylic acid in this reaction is _______ %.
(rounded off to the nearest integer)

Answer 1

Correct Answer: 74 - 76

The formula for calculating the yield of a reaction is:

Yield (%) = (Actual yield / Theoretical yield) × 100

Given:

• Actual yield = 8.55 g
• Theoretical yield = 10.50 g (mass of 1,2-diphenylethane-1,2-dione)

Substituting the values into the formula:

Yield (%) = 8.55 g / 10.50 g × 100 = 74%

Thus, the yield of the carboxylic acid in this reaction is 74%.