What mass of NaCH,CO, should the student dissolve in the HCH,CO, solut

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter15: Complex Ion And Precipitation Equilibria
Section: Chapter Questions
Problem 11QAP: A buffer is prepared by dissolving 0.0250 mol of sodium nitrite, NaNO2, in 250.0 mL of 0.0410 M...
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A chemistry graduate student is given 250. mL of a 1.70M acetic acid (HCH,CO,) solution. Acetic acid is a weak acid
- 5
with K,= 1.8 × 10 °. what mass of NaCH,C0, should the student dissolve in the HCH,CO, solution to turn it into a
buffer with pH = 4.19?
You may assume that the volume of the solution doesn't change when the NaCH,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 250. mL of a 1.70M acetic acid (HCH,CO,) solution. Acetic acid is a weak acid - 5 with K,= 1.8 × 10 °. what mass of NaCH,C0, should the student dissolve in the HCH,CO, solution to turn it into a buffer with pH = 4.19? You may assume that the volume of the solution doesn't change when the NaCH,CO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
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