Question

Solid aluminum hydroxide is added to a solution of potassium phosphite.

Give the following

Complete reaction

Complete ionic equation

Net ionic equation

Answer 1

• The complete balanced equation will be,

`Al(OH)_3(aq)+K_3PO_3(aq)\rightarrow AlPO_3(s)+3KOH(aq)`

• The complete ionic equation in separated aqueous solution will be,

`Al^(3+)(aq)+3OH^(-)(aq)+3K^(+)(aq)+PO_3^(3-)(aq)\rightarrow AlPO_3(s)+2K^+(aq)+3OH^(-)(aq)`

• The net ionic equation will be,

`Al^(3+)(aq)+PO_3^(3-)(aq)\rightarrow AlPO_3(s)`

Explanation :

In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The complete balanced equation will be,

`Al(OH)_3(aq)+K_3PO_3(aq)\rightarrow AlPO_3(s)+3KOH(aq)`

The complete ionic equation in separated aqueous solution will be,

`Al^(3+)(aq)+3OH^(-)(aq)+3K^(+)(aq)+PO_3^(3-)(aq)\rightarrow AlPO_3(s)+2K^+(aq)+3OH^(-)(aq)`

In this equation,
`K^+\text{ and }OH^-` are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

`Al^(3+)(aq)+PO_3^(3-)(aq)\rightarrow AlPO_3(s)`