M+ + 2 CN- ⇌ [M(CN)2]-
Step 1: Construct ICE table for the reaction
The formation constant of [M(CN)2]- is 5.30 x 1018, where M is a generic metal.
A 0.160-mole quantity of M(NO3) is added to a liter of 0.710 M NaCN solution. What is the concentration of M+ ions at equilibrium?