Question

Question #9138e

Answer 1

By making sure there are `0.002mol` of `CaCl_2(aq)` per `1L` of aqueous solution (e.g. water).

Answer 2

By dissolving 0.002 mol of `CaCl_2` in 1 L of solution.

Explanation:

Molarity of a solution is the number of moles of the solute per litre of the solution.Hence a 0.002M solution means that 0.002 mol of solute is mixed in a litre of solution.The volume of solution can be changed but the ratio of moles to volume should remain same.