Question

If two strong acids $A,B$ having pH of $1$ and $2$ of same volume respectively are mixed, then what is the pH range of the new solution?

• A. Less than $1$
• B. Greater than $2$
• C. Between $1$ and $2$
• D. Can't be calculated

Answer 1

Answer: (C)

Between $1$ and $2$

Concentration of $H^{+}$ in $aci{d}_1={10}^{1}M\Rightarrow 10Vmol$

Concentration of $H^{+}$ in $aci{d}_2={10}^{2}M\Rightarrow 100Vmol$

Concentration of mixture of 2 acids dissoved in same volume$=\frac{10V+100V}{2V}=55M$

$pH$ of the mixture $=-log\left[55\right]=1.74$