Question 6 • Chemistry
The balanced equation requires 2 moles of salicylic acid for every 1 mole of acetic anhydride. The amounts are 70.0 g ÷ 138.12 g/mol ≈ 0.507 mol salicylic acid and 80.0 g ÷ 102.09 g/mol ≈ 0.784 mol acetic anhydride. Using all 0.507 mol of salicylic acid would require only about 0.254 mol of acetic anhydride, so salicylic acid runs out first. The limiting reactant is salicylic acid, choice C.
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