calculate the maximum theoretical percent recovery from the recrystallization of 1.00g of benzoic acid

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calculate the maximum theoretical percent recovery from the recrystallization of 1.00g of benzoic acid

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Verity 5 years 2021-07-18T11:57:56+00:00 1 Answers 402 views 0

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  1. binhan
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    2021-07-18T11:59:47+00:00
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    Answer:

    The maximum theoretical percent recovery from the recrystallization of 1.00 g of benzoic acid from 15 mL of water = 94.9%

    Note: The question is incomplete. A similar but complete question is given below:

    The solubility of benzoic acid in water is 6.80g per 100mL at 100 degrees C and 0.34 g per 100mL at 25 degrees C.

    Calculate the maximum theoretical percent recovery from the recrystallization of 1.00 g of benzoic acid from 15 mL of water, assuming the solution is filtered at 25 degrees C.

    Explanation:

    Solubility of benzoic acid in water at 100 degrees C = 6.80g per 100mL

    Solubility of benzoic acid in water  at 25 degrees C =  0.34 g per 100mL

    Mass of benzoic acid to be theoretically recovered from 100 mL of water = 6.80 g – 0.34 g = 6.46 g

    At 25 degrees;

    0.34 g of benzoic acid is present in 100 mL of water

    x g of  benzoic acid will be present in 15 mL of water

    x = 0.34 × 15 / 100 = 0.051 g

    Mass of benzoic acid to be theoretically recovered from 25 mL of water = 1.00 g – 0.051 g = 0.949 g

    Maximum theoretical percent recovery = (mass recovered / original mass dissolved) x 100%

    Maximum theoretical percent recovery =  (0.949 / 1.00) × 100% = 94.9 %

    Therefore, the maximum theoretical percent recovery from the recrystallization of 1.00 g of benzoic acid from 15 mL of water = 94.9%

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