A solution containing 20.0 mL of 1.00 10 -3 M Co 2+ in the presence of

Question:

A solution containing 20.0 mL of 1.00 × 10^-3 M Co²⁺ in the presence of 0.10 M C₂O₄^2- at pH 9.00 was titrated with 1.00 × 10^-2M EDTA. Using formation constants from Appendix I for Co(C₂O₄) and Co(C₂O₄)²₂^-, calculate pCo²⁺ for the following volumes of added EDTA: 0, 1.00, 2.00, and 3.00 mL. Consider the concentration of C₂O₄^2- to be fixed at 0.10 M. Sketch a graph of pCo²⁺ versus milliliters of added EDTA.