The mass of the ester obtained by the interaction of 4.6 g of ethanol with 5 g of formic acid is …

Given:
m (C2H5OH) = 4.6 g
m (CHOOH) = 5 g
Find: m (ester) -?
Decision:
1) C2H5OH + CHOOH => CHOOC2H5 + H2O;
2) n (C2H5OH) = m (C2H5OH) / M (C2H5OH) = 4.6 / 46 = 0.1 mol;
3) n (CHOOH) = m (CHOOH) / M (CHOOH) = 5/46 = 0.11 mol;
4) n (CHOOC2H5) = n (C2H5OH) = 0.1 mol;
5) m (CHOOC2H5) = n (CHOOC2H5) * M (CHOOC2H5) = 0.1 * 74 = 7.4 g.
Answer: The mass of CHOOC2H5 is 7.4 g.