An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of…

An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution would
(Given $\log 2=0.30)$
  1. reduce to $0.5$
  2. increase to $1.3$
  3. remain same
  4. increase to $2$

Solution

$\mathrm{HCl}_{(\mathrm{aq})} \mathrm{pH}=1 ;\left[\mathrm{H}^{+}\right]=10^{-1}$
If equal volume of water is added concentration will become half
$\begin{aligned}& {\left[\mathrm{H}^{+}\right]_{\mathrm{sol}}=\frac{10^{-1}}{2}} \\& \mathrm{pH}=1.3\end{aligned}$

Asked in: JEE Main 2025 (07 Apr Shift 1)

Practice more Ionic Equilibria questions on Aicharya