AP EAMCET · Chemistry · Ionic Equilibrium
Arrange the aqueous solutions of the following salts in the increasing order of \(\mathrm{pH}\)
\[
\begin{array}{ccc}
\mathrm{CuSO}_4 & \mathrm{NaCN} & \mathrm{KCl} \\
\mathrm{I} & \text { II } & \text { III }
\end{array}
\]
- A I < II < III
- B I < III < II
- C III < II < I
- D II < III < I
Answer & Solution
Correct Answer
(B) I < III < II
Step-by-step Solution
Detailed explanation
\(\mathrm{NaCN}\) is the salt of strong base \((\mathrm{NaOH})\) and weak acid (HCN). So, its \(\mathrm{pH}>7\). \(\mathrm{CuSO}_4\) is a salt of strong acid \(\left(\mathrm{H}_2 \mathrm{SO}_4\right)\) and a weak base \(\left[\mathrm{Cu}(\mathrm{OH})_2\right.\), thus its…
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