Mixing of solutions of BaCl_(2) and Na_(2)SO_(4) results in the formation of a precipitate of BaSO_(4) only if.......greater than..........

Mixing of solutions of BaCl_(2) and Na_(2)SO_(4) results in the format

1.	Mixing of solutions of BaCl_(2) and Na_(2)SO_(4) results in the formation of a precipitate of BaSO_(4) only if.......greater than..........
Answer» ANSWER :IONIC PRODUCT, SOLUBILITY product