Please Give All 3 answer. Q1) A student was given a sample of crude salicylic acid...

Please Give All 3 answer.

Q1) A student was given a sample of crude salicylic acid to recrystallize. The initial mass of the crude acid was 131 mg. The mass after recrystallization was 121 mg. Calculate the percent recovery from recrystallization.

Q2) If 91.0 g of oxalic acid and 79.0 g of methanol react to form 89.0 g of dimethyl oxalate and water, what is the percent yield?

Q3) A student measures out exactly 0.109 g of salicylic acid and runs the experiment as dictated in the lab manual. They obtain 0.101 g of aspirin. What is the percent yield for their reaction?

Solutions

Expert Solution

Q1) Percentage of recovery = (mass after recrystallization/crude mass) x 100

= (121/131) x 100 = 92.37%

queen_honey_blossom answered 1 year ago

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