Aspirin acetylsalicylic acidc9h9o4 is a weak monoprotic, Ask an Expert

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Aspirin (acetylsalicylic acid,C9H9O4 ) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolved 2.00g of aspirin in 0.600L of water and measured the ph. What was the Ka value calculated by the student if the pHof the solution was 2.61?

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