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Chapter 23: Problem 45

A concentrated aqueous copper(II) chloride solution is bright green in color. When diluted with water, the solution becomes light blue. Explain.

Short Answer

Expert verified
The color change from bright green to light blue in the aqueous copper(II) chloride solution upon dilution is due to decrease in concentration. The lesser the solution's concentration, the less light is absorbed by the particles and hence, the solution appears light blue.

Step by step solution

01

Identify the Concentrate Solution Color

Initially, the concentrated aqueous copper(II) chloride solution is bright green in color.
02

Recognize the Effect of Dilution

Upon dilution of the solution with water, the concentration of the solution decreases. This means there are now fewer copper(II) chloride particles per unit volume of the solution.
03

Explain the Color Change

The color of the solution depends on the amount of light absorbed by the components of the solution, which in this case is copper(II) chloride. As the number of absorbing particles decreases with dilution, less light gets absorbed and the solution appears light blue.

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