Astudent makes observations when water is added to a blue solution of copper sulfate. the student makes only 1 observation: the solution changes to a lighter shade of blue. is this an example of a chemical reaction? explain your reasoning.

No, I believe this is not an example of a chemical reaction. What we actually see here is a physical change of the solution. Since we are adding more water to an aqueous solution which is also made up mostly of water, what we are simply basically doing is dilution. Since the solution is being diluted, so definitely the color turned lighter.

if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation:

- decrease the number of plants and animals living in the water.