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A 65.0 mL solution of 0.118 M potassium alaninate (H2NC2H5CO2K) is titrated with 0.118 M HCl....

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Chemistry

A 65.0 mL solution of 0.118 M potassium alaninate (H2NC2H5CO2K)is titrated with 0.118 M HCl. The pKa values for the amino acidalanine are 2.344 (pKa1) and 9.868 (pKa2), which correspond to thecarboxylic acid and amino groups, respectively.

a) Calculate the pH at the first equivalence point.

b) Calculate the pH at the second equivalence point.

Answer & Explanation Solved by verified expert
4.3 Ratings (922 Votes)
a at first equivalence point pH 12 pka1 pka2 hence pH 12 23449868 61 b at 2nd equivalence point we have H2NC2H5CO2K aq 2H aq 3HNC2H5CO2H aq H2NC2H5CO2K moles M x V    See Answer
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