Q.

The molar solubility (s) of zirconium phosphate with molecular formula (Zr4+)3(PO43-)4 is given by relations:             [2025]

1 (Ksp9612)13  
2 (Ksp5348)16  
3 (Ksp8435)17  
4 (Ksp6912)17  

Ans.

(4)

Zr3(PO4)43Zr4+3s+4PO43-4s

Ksp=[Zr4+]3[PO43-]4=[3s]3[4s]4=6912s7

s=(Ksp6912)17