A beaker with 1.60x10^2mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of an acid and conjugate base in this buffer is 0.100M. A student adds 6.80mL of 0.490M HCI solution to the beaker. How much will the pH change? The pka of acetic acid is 4.740. Express your answer numerically to two decimal places. Use a minus sign if the pH has decreased.

A beaker with 1.60x10^2mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of an acid and conjugate base in this buffer is 0.100M. A student adds 6.80mL of 0.490M HCI solution to the beaker. How much will the pH change? The pka of acetic acid is 4.740. Express your answer numerically to two decimal places. Use a minus sign if the pH has decreased.

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter14: Equilibria In Acid-base Solutions

Section: Chapter Questions

Problem 53QAP

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A beaker with 195 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.90 mL of a 0.360 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.740. Express your answer numerically to two decimal places. Use a minus (-) sign if the pH has decreased. ► View Available Hint(s) ApH = Submit VE ΑΣΦ Previous Answers Request Answer ?
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A beaker with 1.00×102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 mol L-¹. A student adds 8.70 mL of a 0.320 mol L-¹ HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760. Express your answer numerically to two decimal places. Use a minus ( - ) sign if the pH has decreased. View Available Hint(s) ▸ Hint 1. How to approach the problem ▸ Hint 2. Determine the initial number of moles of conjugate acid Hint 3. Complete previous hint(s) ▸ Hint 4. Determine the number of moles of hydrogen added ▸ Hint 5. Calculate the final quantity of conjugate base ▸ Hint 6. Calculate the final quantity of conjugate acid Hint 7. Determine the new pH ΜΕ ΑΣΦ ApH = -0.80 ? nor 22