Chapter 13, Problem 112QRT

A solution, prepared by dissolving 9.41 g NaHSO₃ in 1.00 kg water, freezes at −0.33 °C. From these data, decide which of these equations is the correct expression for the dissociation of the salt.

1. (a) ${\text{NaHSO}}_3\left(\text{aq}\right)\to {\text{Na}}^{+}(\text{aq})+{\text{HSO}}_3^{-}(\text{aq})$
2. (b) ${\text{NaHSO}}_3\left(\text{aq}\right)\to {\text{Na}}^{+}(\text{aq})+{\text{H}}^{+}(\text{aq})+{\text{SO}}_3^{2-}(\text{aq})$