You have 3 L of a 5M solution of calcium chloride. How many L would you be able to make of a 0.5M solution?

30.0 L.

Explanation:

To solve this problem; we must mention the rule states the no. of millimoles of a substance before and after dilution is the same.

(MV) before dilution = (MV) after dilution

M before dilution = 5.0 M, V before dilution = 3.0 L.

M after dilution = 0.5 M, V after dilution = ? L.

∵ (MV) before dilution = (MV) after dilution

∴ (5.0 M) (3.0 L) = (0.5 M) (V after dilution)

∴ V after dilution = (5.0 M) (3.0 L) / (0.5 M) = 30.0 L.