Question: Copper (II) forms a 1:1 complex with the organic complexing agent R in acidic medium. The formation of the complex can be monitored by spectrophotometer

Copper (II) forms a 1:1 complex with the organic complexing agent R in acidic medium. The formation of the complex can be monitored by spectrophotometer at 480 nm. Use the following data collected under pseudo-first-order conditions to construct a calibration curve of rate versus concentration of R. Find the concentration of copper(II) in an unknown whose rate under the same conditions was 6.2 3 1023 A s21. Also find the standard deviation of the concentration.

., ppm 3.0 5.0 7.0 9.0 Rate, A s 3.6 X 103 5.4 X 10-3 7.9 x 10-3 1.03 X 102

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