Question

What is the molarity of potassium ions in a 0.122m k2 cr 04 solution

a. 0.122 M
b. 0.244 M
c. 0.061 M
d. Depends on the dissociation of K₂CrO₄

Answer 1

The molarity of potassium ions in a 0.122 M K₂CrO₄ solution is 0.122 M.

Step-by-step explanation:

To determine the molarity of potassium ions in a 0.122 M K₂CrO₄ solution, we need to consider the dissociation of K₂CrO₄.

Each formula unit of K₂CrO₄ dissociates into 2 K⁺ ions and 1 CrO₄²⁻ ion.

Therefore, the molarity of potassium ions in the solution is twice the molarity of K₂CrO₄, which is 0.122 M (option A).