Preparation of Solutions
Chemistry ⇒ Solutions and Colloids
Preparation of Solutions starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Preparation of Solutions.
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See sample questions for grade 11
A chemist needs to prepare 250 mL of 0.05 M AgNO3 solution. Calculate the mass of AgNO3 required. (Molar mass = 170 g/mol)
A laboratory technician needs to prepare 1 L of 0.5 M H2SO4 from concentrated H2SO4 (18 M). What volume of concentrated acid is required?
A solution is prepared by dissolving 2.5 g of NaOH (molar mass = 40 g/mol) in water to make 500 mL of solution. What is the molarity?
A student dissolves 5 g of glucose (C6H12O6, molar mass = 180 g/mol) in enough water to make 100 mL of solution. What is the molarity of the solution?
A student needs to prepare 500 mL of 0.2 M KNO3 solution. Calculate the mass of KNO3 required. (Molar mass of KNO3 = 101 g/mol)
A student wants to prepare 100 mL of 0.1 M HCl from a 1 M stock solution. What volume of stock solution should be used?
Describe the difference between a stock solution and a working solution.
Describe the importance of using a volumetric flask in solution preparation.
Describe the steps involved in preparing 250 mL of 0.1 M NaCl solution from solid NaCl.
Explain why it is important to cool a solution to room temperature before making up the final volume in a volumetric flask.
Explain why it is important to use an analytical balance when preparing standard solutions.
Explain why solutions should be mixed thoroughly after preparation.
