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A beaker with 155 mL of an acetic acid buffer with a pH of 5.000 is...

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Chemistry

A beaker with 155 mL of an acetic acid buffer with a pH of 5.000is sitting on a benchtop. The total molarity of acid and conjugatebase in this buffer is 0.100 M. A student adds 5.20 mL of a 0.460 MHCl solution to the beaker. How much will the pH change? The pKa ofacetic acid is 4.740. Express answer numerically to two decimalplaces. Use a minus sign if the pH has decreased.

Answer & Explanation Solved by verified expert
4.4 Ratings (957 Votes)
let x concentration of acid let y concentration of conjugate base x y 0155 L 500 4740 log yx 500 4740 log yx 026 log yx 10026 yx yx 182 182x y    See Answer
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