Question

When aqueous solutions of cobalt(II) nitrate and potassium phosphate are combined, solid cobalt(II) phosphate and a solution of potassium nitrate are formed. The net ionic equation for this reaction is :

Answer 1

Answer: The net ionic equation will be:
`3Co^(2+)(aq)+PO_4^(3-)(aq)\rightarrow Co_3(PO_4)_2(s)`

Step-by-step explanation:

The balanced chemical reaction will be:

`3Co(NO_3)_2(aq)+2K_3PO_4(aq)\rightarrow Co_3(PO_4)_2(s)+6KNO_3(aq)`

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The complete ionic chemical equation is:

`3Co^(2+)(aq)+6NO_3^-(aq)+6K^+(aq)+PO_4^(3-)(aq)\rightarrow Co_3(PO_4)_2(s)+6K^+(aq)+6NO_3^_(aq)`

The ions which are present on both the sides of the equation are potassium and nitrate ions and hence are not involved in net ionic equation.

The net ionic equation is
`3Co^(2+)(aq)+PO_4^(3-)(aq)\rightarrow Co_3(PO_4)_2(s)`