A) 7.2
B) 6.9
C) 7.0
D) 1.0
Correct Answer: B
Solution :
Given \[p{{K}_{a}}(HA)=3.2\] \[p{{K}_{b}}(BOH)=3.4\] As given salt is of weak acid and weak bas \[\therefore \] \[pH=7+\frac{1}{2}p{{K}_{a}}-\frac{1}{2}p{{K}_{b}}\] \[=7+\frac{1}{2}(3.2)-\frac{1}{2}(3.4)\] \[=6.9\]You need to login to perform this action.
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