Q: What causes cobalt chloride to turn pink?


Read this paragraph and choose the correct option from the provided answers:

A solution of cobalt chloride in water is pink due to the presence of the solvated Co 2+ ion. If sufficient HCl is added, the solution turns blue as the CoCl 4 2- ion forms. The reaction can be shifted back to the pink form if more water is added to the solution.

 Choices:

- discussed 2 + ions

- show 2 + ions

- h20 + ions

- co 2+ ions


A:
co 2+ ions