Question

Will PbI2 have a higher solubility in Pb(NO3)2 (aq) or in pure water? Explain your choice.

Answer 1

PbI2 have a higher solubility in in pure water

explanation:

PbI2 ---------------------------> Pb+2 + 2I-

Pb(NO3)2--------------------> Pb+2 + 2NO3-

due to common ion Pb+2 present in Pb(NO3)2 the solubility of PbI2 in Pb(NO3)2 decreases .

according to lechatlier when concentration of product increases the reaction shifts to backward direction .so PbI2 will be formed more that means solubility decreases

when it is placed in water there will be opposite combination of ions

Pb+2 + 2OH- ------------------> Pb(OH)2

I- + H+ -------------------> HI

so in water more soluble