What is the equilibrium expression for the change when iron(II) chloride dissolves?

Question

FeCl2(s) Fe2+(aq) + 2Cl-(aq)

Answer 1

Keq = (Fe^2+aq)(Cl^-aq)^2/(FeCl2). Some may argue that the denominator of FeCl2 should not appear; however, by definition it is 1 and like to put it in.

Answer 2

K= (FE^2+)(Cl^-aq)^2