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(A) When $KHSO_4$ is added to a concentrated solution of $H_2SO_4$,it dissociates as follows: $KHSO_4 \rightarrow K^+ + HSO_4^-$. The $HSO_4^-$ ion ac

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(A) When $KHSO_4$ is added to a concentrated solution of $H_2SO_4$,it dissociates as follows: $KHSO_4 \rightarrow K^+ + HSO_4^-$. The $HSO_4^-$ ion acts as a weak acid and further dissociates in the solution: $HSO_4^- \rightleftharpoons H^+ + SO_4^{2-}$. The release of additional $H^+$ ions into the solution increases the total concentration of $H^+$ ions. Since acidity is directly proportional to the concentration of $H^+$ ions,the acidity of the solution increases.

When $KHSO_4$ is added into a concentrated solution of $H_2SO_4$,the acidity of the solution

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