The equilibrium constant for the formation of Cu(CN)42- is 2.0 x 1030. Calculate the value of pCu2+, i.e. -log[Cu2+], if 2.48 g of CuCl2 is dissolved in 1.000 L of a 0.937 M NaCN solution. The addition of CuCl2 does not affect the volume (the final volume is always 1.000 L).