Question: A metal ion buffer was prepared from 0.030 M ML and 0.020 M L, where ML is a metal ligand complex and L is free

A metal ion buffer was prepared from 0.030 M ML and 0.020 M L, where ML is a metal ligand complex and L is free ligand.
M + L ⇌ ML Kf = 4.0 × 108
Calculate the concentration of free metal ion, M, in this buffer.

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