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To completely neutralize a 0.325 g sample of pure aspirin, 15.50 mL of a sodium hydroxide solution is added. If 16.25 mL of the same sodium hydroxide solution must be added to an aspirin tablet sample during a titration to reach the endpoint, calculate the mass of aspirin in the table

Verified Answer :

a. 0.325 g / 63.55 g/mol = 5.11 X 10^-3 moles Cu. SHould form 5.11 X 10^-3 mol Cu2+

BShould form 5.11 X 10^-3 mol Cu(OH)2

C1 g Zn / 65.4 g/mol = 0.0153 mol Zn

Excess Zn = 0.0153 - 0.0051 = 0.0102 moles excess zinc

D5.11 X 10^-3 mol Mg X 24.3 g/mol = 0.124 grams Mg

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