Which of these moles are electrolytes,PBr3, HBr, and Pb(NO3)2?

Question

Explain in detail, Show the dissociation of electrolytes in water and which of the three will have the biggest effect on the freezing point of a solution.

Answer 1

They want you to say HBr and Pb(NO3)2, because these are ionic compounds.

HBr ===> H+ + Br-

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

PBr3 is a covalent compound, but if you put it in water,

PBr3 + 3H2O ===> 3H+ + 3Br- + 3H+ + PO3(3-)

and I think that they didn't think of that.