An aqueous solution of 43.80 mL of 0.240 mol L-1 NaCN is added to 43.80 mL of 0.240 mol L-1 Zn(NO3)2(aq) at 25oC. Determine the concentration (in mol L-1) of Zn(CN)42- in the solution once it reaches thermodynamic equilibrium at 25oC. Kf(Zn(CN)42-)=2.1×1019

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