For a solution of Ni 2 and ethylenediamine, the following equilibrium constants apply at 20C Calculate the concentration of free Ni 2 in a solution prepared by mixing 0 100 mol of en plus 1 00 mL of 0 010 0 M Ni 2 and diluting to 1 00 L with dilute base (which keeps all the en in its unprotonated f...

Sing large magnitudes of K calculations are done with assumptions They are al ...

For a solution of Ni 2+ and ethylenediamine, the following equilibrium constants apply at 20C: Calculate the

Question:

For a solution of Ni²⁺ and ethylenediamine, the following equilibrium constants apply at 20°C:

Ni²+ + H,NCH,CH,NH, = Ni(en)²+ log K, = 7.52 Ethylenediamine (abbreviated en) Ni(en)?+ + en = Ni(en) log K2 = 6.32 log K3 = 4.49 Ni(en)* + en = Ni(en)*

Calculate the concentration of free Ni²⁺ in a solution prepared by mixing 0.100 mol of en plus 1.00 mL of 0.010 0 M Ni²⁺ and diluting to 1.00 L with dilute base (which keeps all the en in its unprotonated form. Assume that nearly all nickel is in the form Ni(en)₃²⁺, so [Ni(en)₃²⁺] = 1.00 × 10^-5 M. Calculate the concentrations of Ni(en)²⁺ and Ni(en)₂²⁺ to verify that they are negligible in comparison with Ni(en)₃²⁺.