1) Copper solutions are typically blue to blue green in color. What color of lig

Question

1) Copper solutions are typically blue to blue green in color. What color of light would they be expected to absorb in the greatest amount?

- Green

- Blue

- Red

- Violet

2) Based on your answer to the previous question (hopefully you have the correct answer), what wavelength range would you expect to see the maximum absorption of light (in the visible range)?

- 500 nm to 600 nm

- 400 nm to 500 nm

- 300 nm to 400 nm

- 600 nm to 700 nm

3) You should be getting familiar with Beer's law by now. What are the three factors that affect the absorbance of a solution at a particular wavelength?

- length of the solution that the light passes through

- total volume of the solution in the cuvette

- molar absorptivity coefficient

- concentration of absorbing species in solution

4) For the copper(II) tartrate solution, you are determining the concentration of copper(II) ion in the experiment. If the concentration of the copper(II) ion is found to be s, what is the concentration of the tartrate ion?

- 2s

- 3s

- s

- s/2

- s/3

Explanation / Answer

1) Red

2) 600-700

3) length of the solution that the light passes through, molar absorptivity coefficient and concentration of absorbing species in solution.

4) s

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