A chemistry graduate student is given 100. mL of a 1.20M propanoic acid (HC, H, CO,) solution. Propanoic acid is a weak acid with K=1.3 x 10 °. What mass of KC, H,CO, should the student dissolve in the HC,H,CO, solution to turn it into a buffer with pH =5.40? You may assume that the volume of the solution doesn't change when the KC,H,CO, 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
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Chapter17: Principles Of Chemical Reactivity: Other Aspects Of Aqueous Equilibria
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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 100. mL of a 1.20M propanoic acid (HC, H, CO,) solution. Propanoic acid is a weak acid with
K=1.3 x 10. What mass of KC,H,CO, should the student dissolve in the HC,H,CO, solution to turn it into a buffer with pH =5.40?
You may assume that the volume of the solution doesn't change when the KC, H.CO, is dissolved in it. Be sure your answer has a unit symbol,
and round it to 2 significant digits.
Transcribed Image Text:A chemistry graduate student is given 100. mL of a 1.20M propanoic acid (HC, H, CO,) solution. Propanoic acid is a weak acid with K=1.3 x 10. What mass of KC,H,CO, should the student dissolve in the HC,H,CO, solution to turn it into a buffer with pH =5.40? You may assume that the volume of the solution doesn't change when the KC, H.CO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
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