# To determine the formation constant of a 1:1 complex, the following absorbances were measured at 470

To determine the formation constant of a 1:1 complex, the

following absorbances were measured at 470 nm in a 2.50-cm cell for the ligand

concentrations shown. The total metal concentration was c_{M} = 7.50 10^{-4}

M.

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To determine the formation constant of a 1:1 complex, the following absorbances were measured at 470

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(a) Use linear regression and the Benesi-Hildebrand equation

(Equation 14-11) to determine the formation constant and the difference in

molar absorptivities at 470 nm.

(b) Use nonlinear regression and Equation 14-10 to find the

values of K_{f} and Δe. Start with initial estimates of K_{f}

= 50 and De = 50.