When 73.3 mL of acetic acid (density=1.053g/mL, M.W.=60.05g/mol) and 95.7 mL of

Question

When 73.3 mL of acetic acid (density=1.053g/mL, M.W.=60.05g/mol) and 95.7 mL of benzyl alcohol (density=1.04535g/mL, M.W.=108.13g/mol) undergo an esterification reaction and 38.2 mL of a peach fragrance ester, benzyl acetate (density=1.5232g/mL, M.W.=150.17g/mol), and water is produced. Sulfuric acid is used as a catalyst. This is the same type of reaction used in experiment 4 to produce isoamyl acetate, banana oil. Use this information to calculate the values requested below.

1 How much acetic acid is there (in mol)?

2 How much benzyl alcohol is there (in mol)?

3 What is the theoretical yield of benzyl acetate (in mL)

4 What is the percent yield of benzyl ester?

Explanation / Answer

a.) mol of acetic acid = 1.053*73.3/60.05=1.28 mol

b.) mol of benzyl alcohol=95.7*1.04535/108.13=0.925 mol

c.) theoritical yield=0.925*150.17
.5232=91.21 ml

d.) %age= 38.2/91.21*100=41.88%

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