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A student calculated that the maximum theoretical mass of ethanol made in the reaction would be 90 g. In a practical the student actually made 60 g of ethanol. Calculate the percentage yield. Give your answer to two significant figures. Use the equation: percentage yield = mass of product actually made / maximum theoretical mass of product × 100

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Answer:

Percent yield = 66.7%

Explanation:

Percent yield is a way to determine the efficiency of a reaction. Is widely used in organic chemistry. The formula is:

Percent yield = Actual yield / Theoretical yield * 100

In the problem, the actual yield obtained was 60g and theoretical yield is 90g. Replacing:

Percent yield = 60g / 90g * 100

Percent yield = 66.7%