An aqueous solution of HCl with pH 1.0 is diluted by adding equal...

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)

Options

Areduce to $0.5$
Bincrease to $1.3$
Cremain same
Dincrease to $2$

Correct answer

B. increase to $1.3$

Step-by-step 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}

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