6.2.1 The solubility product rule A B (s)-nAm"(aq)+mB"-(aq) J={c(Am+)}"{c(B"-)}"m The solubility product rule:The reaction quotient criterion for precipitationsolubility equilibria equilibrium proceeds in reverse direction p,equilibrium state,saturated solution <Kp,equilibrium proceeds in forward direction6.2.1 The solubility product rule m n n m { (A )} { (B )} + - J = c c A B (s) nA (aq) mB (aq) m n n m + - + The solubility product rule: The reaction quotient criterion for precipitation—solubility equilibria ☆ J >Ksp  , equilibrium proceeds in reverse direction ☆ J = Ksp  , equilibrium state, saturated solution ☆ J < Ksp  , equilibrium proceeds in forward direction