The accompanying absorption data were recorded at 390 nm in 1.00-cm cells for a continuous-variations study of the colored product formed between Cd²⁺ and the complexing reagent R.

(a) Find the ligand-to-metal ratio in the product.
(b) Calculate an average value for the molar absorptivity of the complex and its uncertainty. Assume that in the linear portions of the plot the metal is completely complexed.
(c) Calculate K_f for the complex using the stoichiometric ratio determined in (a) and the absorption data at the point of intersection of the two extrapolated lines.

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Reagent Volumes, mL (Ca = 1.25 CR = 1.25 Solution x 10- M x 10-4M A390 10.00 0.00 0.000 9.00 1.00 0.174 2 8.00 2.00 0.353 7.00 3.00 4.00 0.530 4 6.00 0.672 5 5.000 4.00 5.00 0.723 6. 6.00 0.673 7 3.00 7.00 0.537 8 2.00 8.00 0.358 9. 1.00 9.00 0.180 10 0.00 10.00 0.000 I34