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A buffer solution is prepared by mixing 90.9 mL of 0.0847 M sodium hydrogen citrate with...

A buffer solution is prepared by mixing 90.9 mL of 0.0847 M sodium hydrogen citrate with 41.0 mL of 0.810 M sodium citrate. A table of pKa=6.4

1. Calculate the pH (to two decimal places) of this solution. Assume the 5% approximation is valid and that the volumes are additive.

2.Calculate the pH (to two decimal places) of the buffer solution after the addition of 67.1 mL of a 0.0121 M solution of calcium hydroxide to the existing buffer solution.



Assume the 5% approximation is valid and that the volumes are additive.

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