A) \[1.3\times {{10}^{-2}}M\]
B) \[1.8\times {{10}^{-5}}M\]
C) \[1.8\times {{10}^{-6}}M\]
D) \[1.34\times {{10}^{-3}}M\]
Correct Answer: D
Solution :
Acetic acid is a weak electrolyte, therefore, it obeys Ostwalds dilution law \[[{{H}^{+}}]=\sqrt{{{K}_{a}}\times c}=\sqrt{(1.8\times {{10}^{-5}}\times 0.1)}\] \[=\sqrt{(1.8\times {{10}^{-6}})}\] \[=1.34\times {{10}^{-3}}M\]
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