A buffer solution is prepared by mixing 21.8 mL of 0.974 M phenylammonium chlori
ID: 917652 • Letter: A
Question
A buffer solution is prepared by mixing 21.8 mL of 0.974 M phenylammonium chloride with 43.8 mL of 0.0931 M phenylamine (aniline).
using A table of pKa values:
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 20.3 mL of a 0.0123 M solution of hydrobromic acid to the existing buffer solution.
Assume the 5% approximation is valid and that the volumes are additive.
Explanation / Answer
A buffer solution is prepared by mixing 21.8 mL of 0.974 M phenylammonium chlori
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