buffer solution is prepared by mixing 36.9 mL of 0.260 M sodium hydrogen oxalate
ID: 927948 • Letter: B
Question
buffer solution is prepared by mixing 36.9 mL of 0.260 M sodium hydrogen oxalate with 43.6 mL of 0.0819 M sodium oxalate.
A table of pKa values can be found here.
1. Calculate the pH (to two decimal places) of this solution.
Assume the 5% approximation is valid and that the volumes are additive.
hydrogen oxalate ion pka is 4.19 . and oxalate ion pkb is 9.81
2-Calculate the pH (to two decimal places) of the buffer solution after the addition of 7.16 g of sodium oxalate (Na2OOCCOO) to the buffer solution above.
Assume 5% approximation is valid and that the volume of solution does not change.
Explanation / Answer
buffer solution is prepared by mixing 36.9 mL of 0.260 M sodium hydrogen oxalate
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