Step 1: Moles of aspirin
molar mass HC 9H7O4 = 180.1 g/mol
Step 2: Molarity of aspirin
Molarity = 7.614x10-3 M
A typical aspirin tablet contains 325 mg acetylsalicylic acid (HC 9H7O4). Calculate the pH of a solution that is prepared by dissolving two aspirin tablets in enough water to make one cup (237 mL) of solution. Assume the aspirin tablets are pure acetylsalicylic acid, Ka = 3.3 X 10 -4.
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