A chemistry graduate student is given 450.mL of a 0.30M chloroacetic acid  (HCH2ClCO2) solution. Chloroacetic acid is a weak acid with =Ka×1.310^−3. What mass of KCH2ClCO2 should the student dissolve in the HCH2ClCO2 solution to turn it into a buffer with pH =2.83? You may assume that the volume of the solution doesn't change when the  KCH2ClCO2 is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter17: Principles Of Chemical Reactivity: Other Aspects Of Aqueous Equilibria
Section: Chapter Questions
Problem 89GQ: A buffer solution is prepared by dissolving 1.50 g each of benzoic acid, C6H5CO2H, and sodium...
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A chemistry graduate student is given 450.mL of a 0.30M chloroacetic acid 

(HCH2ClCO2) solution. Chloroacetic acid is a weak acid with =Ka×1.310^−3. What mass of KCH2ClCO2 should the student dissolve in the HCH2ClCO2 solution to turn it into a buffer with pH =2.83?

You may assume that the volume of the solution doesn't change when the 

KCH2ClCO2 is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

 

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