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Acetylsalicylic acid, C9H7O2COOH, has a pKa = 3.480. A solution was prepared by dissolving 6.20 g of acetylsalicylic...

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Chemistry

Acetylsalicylic acid,C9H7O2COOH, has a pKa =3.480. A solution was prepared by dissolving 6.20 g ofacetylsalicylic acid in 1.000 L of solution.   mw =180.16 g/mol.

A. Calculate the pH using thequadratic and the approximateapproaches.

Approximate method yields pH =2.47

Quadratic methodsyields     pH = 2.49

B   Calculate thepercent error introduced in the hydrogen ion concentrationif the approximate solution was chosen

% error in terms of hydrogen ionconcentration is 4.98%

I know the answer for B, Ijust don't know how to do it :(

Answer & Explanation Solved by verified expert
4.4 Ratings (729 Votes)
pKa 3480logKa 3480Ka 33 x 104Moles of Salicylic acid given wtmolar mass 62018016 00344 molesMolarity of Salicylic acid moles of    See Answer
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