Question

An aqueous solution of sodium sulfate is allowed to react with an aqueous solution of calciumnitrate.The complete ionic equation contains which of the following species (when balanced in stan-dard form)?a.2Na+aq)b.2SO42-(aq)c.3Ca2+(aq)d.NO3-(aq)e.K+(aq)

Answer 1

Answer : The correct option is, (a)
`2Na^+`

Explanation :

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.

Net ionic equation : 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 balanced molecular equation will be,

`Na_2SO_4(aq)+Ca(NO_3)_2(aq)\rightarrow 2NaNO_3(aq)+CaSO_4(s)`

The complete ionic equation in separated aqueous solution will be,

`2Na^+(aq)+SO_4^(2-)(aq)+Ca^(2+)(aq)+2NO_3^(-)(aq)\rightarrow 2Na^+(aq)+2NO^(3-)(aq)+CaSO_4(s)`

In this equation the species present are,
`2Na^+,2NO_3^-,Ca^(2+)\text{ and }SO_4^(2-)` are the spectator ions.

Hence, the complete ionic equation contains specie is
`2Na^+`