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A beaker with 1.30×102 mL of an acetic acid buffer with a pH of 5.000 is...

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Chemistry

A beaker with 1.30×102 mL of an acetic acid bufferwith a pH of 5.000 is sitting on a benchtop. The total molarity ofacid and conjugate base in this buffer is 0.100 M. Astudent adds 5.40 mL of a 0.440 MHCl solution to thebeaker. How much will the pH change? The pKa of aceticacid is 4.740.

Express your answer numerically to two decimal places. Use aminus ( ? ) sign if the pH has decreased.

Answer & Explanation Solved by verified expert
4.2 Ratings (797 Votes)
Given that pH 500 HendersonHasselbalch equation pH pKa logCH3COO HC2H3O2 500 474 logC2H3O2 HC2H3O2 026 logCH3COO HC2H3O2 CH3COO HC2H3O2 182 HC2H3O2 CH3COO 0100 Let x CH3COO Then 0100 x CH3COOH    See Answer
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