Question

When the ionic compound Ca(NO₃)₂ dissociates in water the equation is 

$$ \begin{aligned} &\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2} \text { (s) } \rightarrow \mathrm{Ca}^{2+} \text { (aq) }+\mathrm{N}_{2} \text { (g) }+3 \mathrm{O}_{2} \text { (g) } \\ &\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2} \text { (s) } \rightarrow \mathrm{Ca}^{2+}(\mathrm{aq})+2 \mathrm{~N}^{3-}(\mathrm{aq})+6 \mathrm{O}^{2-}(\mathrm{aq}) \\ &\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}(\mathrm{~s}) \rightarrow \mathrm{Ca}^{2+}(\mathrm{aq})+2 \mathrm{NO}_{3}^{-}(\mathrm{aq}) \\ &\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}(\mathrm{~s}) \rightarrow \mathrm{Ca}^{2+}(\mathrm{aq})+\left(\mathrm{NO}_{3}\right)_{2}^{2-} \text { (aq) } \end{aligned} $$

Answer 1

The compound given is Ca(NO₃)₂.

Ionic compounds dissociate into the water and produce ions in the solution.

Since the ionic compound Ca(NO₃)₂ is made up of cation Ca²⁺ and 2 anions NO₃^-.

Hence it will dissociate into cation and anion in water as,

=> Ca(NO₃)₂ (s) --------> Ca²⁺ (aq) + 2 NO₃^- (aq)

 

The answer is => Ca(NO3)2 (s) --------> Ca2+ (aq) + 2 NO3- (aq)