A) Five
B) Four
C) Three
D) One
Correct Answer: C
Solution :
\[HA\]⇌\[{{H}^{+}}+{{A}^{-}}\] \[[{{H}^{+}}]=0.1\,\,M\]; \[{{[{{H}^{+}}]}^{2}}={{K}_{a}}\times C\] \[[{{H}^{+}}]=\sqrt{{{K}_{a}}\times C}=\sqrt{1\times {{10}^{-5}}\times 0.1}=\sqrt{{{10}^{-6}}}\] \[[{{H}^{+}}]={{10}^{-3}}M;\,\,pH=3\]You need to login to perform this action.
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