You mix a 130.0 −mL sample of a solution that is 0.0147 M in NiCl2 with a 175.0 −mL sample of a solution that is 0.350 M in NH3. After the solution reaches equilibrium, what concentration of Ni2+(aq) remains? The value of Kf for Ni(NH3)6^2+ is 2.0×10^8.