University:
College
Course:
College Chemistry
Academic year:

2022
Views:

470

Pages:

1
Author:

SpaceCadet101

Molarity Problems 1. What is the molarity of a solution that was prepared by dissolving 14.2 g of NaNO3 (molar mass = 85.0 g/mol) in enough water to make 350 mL of solution? 14.2g NaNO3  1mol NaNO3   ≡ 0.350L soln  85 gNaNO3  Ans: 0.477 M 2. What is the molarity of a solution that was prepared by dissolving 82.0 g of CaCl2 (molar mass = 111.1 g/mol) in enough water to make 812 mL of solution? 82.0 g CaCl2  1mol CaCl2   ≡  0.812L soln  111.1 gCaCl2  Ans: 0.909 M 3. What is the molarity of a solution that contains 5.5 g of HCl (molar mass = 36.5 g/mol) dissolved in enough water to make 250 mL of solution? 5.5 g HCl  1mol HCl   ≡  0.250L soln  36.5 g HCl  Ans: 0.60 M 4. How many grams of NaBr (molar mass = 102.9 g/mol) would be needed to prepare 700 ml of 0.230 M NaBr solution?  0.230mol NaNO3  102.9 gNaNO3  0.700L soln  ≡ 1 L soln 1 mol NaNO 3    Ans: 16.6 g NaBr