Chapter 4, Problem 2KSP

Consider the following net ionic equation: ${\text{Cd}}^{\text{2+}}\left(aq\right)+{\text{2OH}}^{\text{-}}\left(aq\right)\to \text{Cd}{\left(\text{OH}\right)}_{\text{2}}\left(s\right).$ If the spectator ions in the ionic equation are ${\text{NO}}_{\text{3}}^{\text{-}}\left(aq\right)+{\text{K}}^{\text{+}}\left(aq\right)$, what is the molecular equation for this reaction?

(a)

${\text{CdNO}}_{\text{3}}\left(aq\right)+\text{KOH}\left(aq\right)\to \text{Cd}{\left(\text{OH}\right)}_{\text{2}}\left(s\right)+{\text{KNO}}_{\text{3}}\left(aq\right)$

(b)

${\text{Cd}}^{\text{2+}}\left(aq\right)+{\text{NO}}_{\text{3}}^{\text{-}}\left(aq\right)+{\text{2K}}^{\text{+}}\left(aq\right){\text{+OH}}^{\text{-}}\left(aq\right)\to \text{Cd}{\left(\text{OH}\right)}_{\text{2}}\left(s\right)+{\text{2K}}^{\text{+}}\left(aq\right)+{\text{NO}}_{\text{3}}^{\text{-}}\left(aq\right)$

(c)

$\text{Cd}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(aq\right)+\text{2KOH}\left(aq\right)\to \text{Cd}{\left(\text{OH}\right)}_{\text{2}}\left(s\right)+{\text{2KNO}}_{\text{3}}\left(aq\right)$

(d)

$\text{Cd}{\left(\text{OH}\right)}_{\text{2}}\left(s\right)+{\text{2KNO}}_{\text{3}}\left(aq\right)\to \text{Cd}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(aq\right)+\text{2KOH}\left(aq\right)$

(e)

${\text{Cd}}^{\text{2+}}\left(aq\right)+{\text{NO}}_{\text{3}}^{\text{-}}\left(aq\right)+{\text{K}}^{\text{-}}\left(aq\right)+{\text{OH}}^{\text{-}}\left(aq\right)\to \text{Cd}{\left(\text{OH}\right)}_{\text{2}}\left(s\right)+{\text{K}}^{\text{+}}\left(aq\right)+{\text{NO}}_{\text{3}}^{\text{-}}\left(aq\right)$