33. Solution to Chemistry Problem

33. Solution to Chemistry Problem

3. 50 ml of Cu2 solution were placed in an amperometric titration cell and titrated with 0.001 M EDTA solution at E = 0.25 V (rel., NCE) in an ammonium buffer medium. Under these conditions, only the copper ammonia complex is reduced. Plot a titration curve and calculate the concentration of Cu2 in the solution, mg/l.
V, ml 0.00 0.50 1.00 1.50 2.00 2.50 3.00
I, μA 22.5 16.0 10.0 3.75 0.50 0.50 0.50

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