Observe the following stoichiometric equation $\mathrm{P}_4+3 \mathrm{OH}^{-}+3 \mathrm{H}_2 \mathrm{O}…
Observe the following stoichiometric equation
$\mathrm{P}_4+3 \mathrm{OH}^{-}+3 \mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{PH}_3+3 x^{-}$
What is the conjugate acid of $x^{-}$?
Phosphorous acid
Hypophosphorous acid
Phosphoric acid
Pyrophosphoric acid
Solution
Balanced stoichiometric equation is:
$\mathrm{P}_4+3 \mathrm{OH}^{-}+3 \mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{PH}_3+3 \mathrm{H}_2 \mathrm{PO}_2^{-}$
conjugate of $\mathrm{H}_2 \mathrm{PO}_2^{-}$is $\mathrm{H}_3 \mathrm{PO}_2$.
$\mathrm{H}_3 \mathrm{PO}_2$ is hypophosphorous acid.