A chemistry graduate student is given 125. mL of a 1.30 M acetic acid (HCH,CO,) solution. Acetic acid is a weak acid with K= 1.8 x 10. What mass of -5 %3D a KCH;CO, should the student dissolve in the HCH,C0, solution to turn it into a buffer with pH = 4.34? %3D You may assume that the volume of the solution doesn't change when the KCH,CO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

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A chemistry graduate student is given 125. mL of a 1.30 M acetic acid (HCH,CO,) solution. Acetic acid is a weak acid with K= 1.8 x 10. What mass of
-5
%3D
a
KCH;CO,
should the student dissolve in the HCH,C0, solution to turn it into a buffer with pH = 4.34?
%3D
You may assume that the volume of the solution doesn't change when the KCH,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 125. mL of a 1.30 M acetic acid (HCH,CO,) solution. Acetic acid is a weak acid with K= 1.8 x 10. What mass of -5 %3D a KCH;CO, should the student dissolve in the HCH,C0, solution to turn it into a buffer with pH = 4.34? %3D You may assume that the volume of the solution doesn't change when the KCH,CO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
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