Question

Which of the following solutions has the same concentration of $H^{+}$ ions as $0.1N$ $HCl$?

• A. $0.05M$ $H_2{SO}_4$
• B. $0.3M$ $H_3{PO}_4$
• C. $0.2M$ $H{NO}_3$
• D. All the above

Answer 1

The correct option is A $0.05M$ $H_2{SO}_4$

$0.1NHCl$ contains $0.1mole$ of $H^{+}$ ions as number of equivalent moles = $1$ for $HCl$. For $H_{2}S{O}_4$ number of equivalent moles = $2$ then, $0.05M{H}_{2}S{O}_4$ has $0.05\times 2=0.1moles{H}^{+}$ ions. $0.3M{H}_{3}P{O}_4$ has 0.9 moles $H^{+}$ ions and $0.2MHN{O}_3$ has 0.2 mole $H^{+}$ ions.