What is the molarity of 2.0 liters of an aqueous solution that contains 0.50 mole of potassium iodid

August 2019 NY Regents Chemistry Exam

39 What is the molarity of 2.0 liters of an aqueous solution that contains 0.50 mole of potassium iodide, KI?

(1) 1.0 M

(2) 2.0M
(3) 0.25 M

(4) 0.50M

Solution: Table T on the Reference Table provides the formula for molarity

molarity = moles of solute/liters of solution

Now, all we have to do is plug our numbers. Molarity = 0.5mol/ 2.0L = 0.25M

Answer:3

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