What would be the resulting molarity of a solution made by dissolving 17.8 grams of LiF in enough water to make a 915-milliliter solution? Show all of the work needed to solve this problem.
First, determine the amount of substance in moles by dividing the given amount in grams by the molar mass. 17.8 grams LiF x (1 mole / 25.94 grams LiF) = 0.686 moles LiF Divide this amount of substance by the volume of the solution in liters. molarity = 0.686 moles LiF / 0.915 L sol'n The molarity is therefore, 0.75 M.
