Chemistry, 08.04.2020 04:32 carolinasoto
A chemistry graduate student is given 125.mL of a 0.20M acetic acid HCH3CO2 solution. Acetic acid is a weak acid with =Ka×1.810−5. What mass of NaCH3CO2 should the student dissolve in the HCH3CO2 solution to turn it into a buffer with pH =4.47?
Answers: 2
.
in this expression, we get:
![pH=pK_a+\log \frac{[Salt]}{[Acid]}](/tpl/images/0588/8914/e961a.png)
![4.47=4.74+\log (\frac{[Salt]}{0.20})](/tpl/images/0588/8914/d9d31.png)
![[Salt]=0.107M](/tpl/images/0588/8914/d66e6.png)
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A chemistry graduate student is given 125.mL of a 0.20M acetic acid HCH3CO2 solution. Acetic acid is...
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