1. Calculate the molarity of a solution if 18 mol of CaCl2 is dissolved to make 200mL of solution.

The molarity is 90 M

Explanation:

Molarity is a measure of concentration that indicates the amount of moles of solute (in this case CaCl2) in 1 liter of solution (1000ml). In this case we calculate it that way:

200 ml solution 18 mol CaCl2

1000ml solutionx= (1000ml solutionx18 mol CaCl2)/200 ml solution

x=90 mol CaCl2---> the solution is 90 M

it should be p1 v1 = p2 v2

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