Answer:
[tex]S=4.47\times 10^{-4}mol/L[/tex]
Explanation:
first write the balance chemical reaction:
[tex]SrSO_4 \rightleftharpoons Sr^{2+} + SO_4^{2-}[/tex]
Lets assume that solubilty=S:
[tex][Sr^{2+}] =S;[/tex]
[tex][SO_4^{2-}] =S;[/tex]
[tex]Ksp =[Sr^{2+}] [SO_4^{2-}][/tex]
[tex]Ksp=S\times S[/tex]
[tex]S=\sqrt{Ksp}[/tex]
[tex]S=\sqrt{2.8 \times 10^{-7}}[/tex]
[tex]S=4.47\times 10^{-4}mol/L[/tex]
