Molar ionic conductance of

 ${\mathrm{Ca}}^{+2}\text{ is ' }{\mathrm{x}}^{\mathrm{\prime }}{\mathrm{Sm}}^2$ ${\mathrm{mole}}^{-1}\text{ and that of }{\mathrm{PO}}_4^{-3}\text{ is ' }\mathrm{y}\text{ ' }{\mathrm{Sm}}^2{\mathrm{mole}}^{-1}$

Equivalent conductance of calcium phosphate $\text{ is.... Sm }{\mathrm{Smeq}}^2$