What happens when ammonium sulphate solution is added to a solution containing both `Sr^(2+)` and `Ca^(2+)` ions ?

Explanation

`Sr^(2+)+NH_(4)^(+)+SO_(4)^(2-)toSrSO_(4)darr ("white")+NH_(4)^(+)`
`Ca^(2+)+2NH_(4)^(+)+2SO_(4)^(2-) to (NH_(4))_(2)[Ca(SO_(4))_(2)]` (soluble complex).