What is the concentration of m +2 ions at equilibrium

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Question- The formation constant of [M (CN)6] ^-4 is 2.50 X 10 ^17 where M is a generic metal. A 0.160 mole quantity of M (NO3)2 is added to a liter of 1.190 M NaCn solution. What is the concentration of M +2 ions at equilibrium?

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