Question

After a reaction went to completion, the crude reaction mixture consisted of two compounds, A and B, which were isolated by extraction. After each compound was dried, their masses were found to be, 117 mg of compound A and 89 mg of compound B. Both compounds were individually recrystallized and weighed again. After recrystallization, the mass of compound A was 93 mg and the mass of compound B was 83 mg. Calculate the percent recovery from recrystallization for both compounds

Answer 1

See explanation

Step-by-step explanation:

Mass of impure compound A = 117 mg

Mass of impure compound B = 89 mg

Mass of pure compound A = 93 mg

Mass of pure compound B = 83 mg

Percentage recovery of pure compound A = 93 mg/117 mg * 100 = 79.5 %

Percentage recovery of pure compound B = 83mg/89 mg * 100/1 = 93.3 %