Aspirin/ yield <span title="help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!">help!!!!!!!!!!!!!!!!!!!!!...</span>

Question

Calculate the theoretical yield of aspirin if you started with 1.75 g of Salicylic acid. (If it helps Salicylic acid is MM=138)

Answer 1

salicylic acid + acetic anhydride ----&gt;  aspirin + acetic acid

C7H6O3 + C4H6O3  ----&gt;  C9H8O4 + C2H4O2

1 mol of salicylic acid (SA) produces 1 mol aspirin (A)

1.75 g SA x (1 mol / 138 g) = 0.0127 mol SA

0.0127 mol SA x (1 mol A / 1 mol SA) = 0.0127 mol A

The molar mass of C9H8O4 (A) is 180. g/mol.

0.0127 mol A x (180 g / 1 mol) = 2.29 g A (aspirin)