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A 108.9 g sample of willow bark was extracted and 3.914 g of salicylic acid was...

A 108.9 g sample of willow bark was extracted and 3.914 g of salicylic acid was obtained as a pure compound. What was the percentage yield of salicylic acid, based on the mass of willow bark used? Do not include the percentage sign in your answer. Answer to two decimal places.

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Answer #1

Solution.

The percentage yield measures the effectiveness of a performed procedure. It can be calculated by dividing the amount of the desired product obtained by the ideal amount yield that would be 100%:

so, to get a real percentage yield of extraction we would need to know how much salicylic acid willow bark contains. We are not provided with these data and the mass of willow bark will be considered as theoretical predicted mass of salicylic acid:

Answer (rounded to two decimal places): 3.59

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