4. Solution to Chemistry Problem

4. Solution to Chemistry Problem

44. A 0.5112 g sample of the preparation was dissolved and after appropriate treatment, copper(II) ions were titrated with EDTA (C = 0.09842 mol/l) spectrophotometrically at λ = 620 nm. Plot a titration curve and calculate the mass fraction (%) of copper in the preparation using the following data:
V(EDTA), ml 1.0 2.0 3.0 4.0 5.0 6.0
A 0.160 0.250 0.350 0.440 0.450 0.450

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