Question

Write the balanced NET ionic equation for the reaction when CaBr₂ and Na₃PO₄ are mixed in aqueous solution. If no reaction occurs, simply write only NR.

Answer 1

Answer:

3Ca2+ (aq) + 2PO43- (aq) ---> Ca3(PO4)2 (s)

Explanation:

A net ionic equation is that equation that removes the spectator ions from the reaction. Spectator ions are the ions that are present in both the reactant and product side of the reaction i.e. ions that do not react. The steps of writing an ionic equation are:

- Write the balanced molecular equation:

3CaBr2(aq) + 2Na3PO4(aq) --> Ca3(PO4)2(s) + 6NaBr(aq)

- Split the electrolytes into ions:

{3Ca2+ (aq) + 6Br- (aq) } + {6Na+ (aq) + 2PO43- (aq)}----> 6Na+ + 6Br- + Ca3(PO4)2(s)

- Cancel out the spectator ions on both sides of the reaction. The spectator ions in this case are 6Na+ and 6Br-. Hence, we have our ionic equation

3Ca2+ (aq) + 2PO43- (aq) ---> Ca3(PO4)2 (s)