\textbf{230-} If the pH of a 0.1 molar KX solution is smaller than the pH of a 0.1 molar $\text{KX}'$ solution, which of the following is always correct?
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(1) HX is a stronger acid than $\text{HX}'$. \hfill (2) KX is acidic and $\text{KX}'$ is a basic salt.
(3) $K_a$ of HX is smaller than $K_a$ of $\text{HX}'$. \hfill (4) X can be a hydroxide ion and $\text{X}'$ can be a cyanide ion.
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