Question

If $K_{a_1}$ and $K_{a_2}$ of $H_{2}S{O}_4$ are ${10}^{-2}$ and ${10}^{-6}$ respectively at a certain temperature, then :

• A. $K_{a_1}>K_{a_2}$ because it is easy to abstract from $H_{2}S{O}_4$ and less easy to abstract $H^{+}$ from $HS{O}_4^{-}$.
• B. $K_{a_1}$ and $K_{a_2}$ may be measured in acetic acid.
• C. $K_{a_1}$ and $K_{a_2}$ are measured in $H_{2}O$.
• D. The $H^{+}$ ion conc. of $0.01M{H}_{2}S{O}_4$ will be less than $0.02M$.

Answer 1

Answer: (A), (B)

The correct options are
A $K_{a_1}>K_{a_2}$ because it is easy to abstract from $H_{2}S{O}_4$ and less easy to abstract $H^{+}$ from $HS{O}_4^{-}$.
B $K_{a_1}$ and $K_{a_2}$ may be measured in acetic acid.