November 22nd, 2011

Practice Problems

Solve the following problems: 1.Calculate the molarity of 1.60L of a solution containing 1.55 g of dissolved KBr. 2.How much calcium hydroxide, in moles, is needed to produce 1.5 L of a 0.25M solution? 3.How many grams of calcium chloride should be dissolved in 500.0 mL of water to make a 0.20M solution of calcium chloride? 4.M1V1 = M2V2. You are asked to make a 0.50L solution of calcium chloride with a molarity of 0.300M. How much volume of a stock solution with a molarity of 2.00M do you need in order to make your solution? 5.What volume of a 3.00MKI stock solution would you use to make a 0.300L of a 1.25M KI solution? 6. What is the molality of a solution containing 10.0 mol of sodium sulfate dissolved in 1000.0 g of water? 7. What is the molality of a solution containing 20.0 g of hydrochloric acid dissolved in 200.0 g of water? 8. How much barium hydroxide is needed to make a 1.0m aqueous solution?