Preparation of Solutions
Chemistry ⇒ Solutions and Colloids
Preparation of Solutions starts at 9 and continues till grade 12.
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See sample questions for grade 11
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.
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?
Which of the following concentrations is NOT commonly used in solution preparation?
(1) Molarity
(2) Molality
(3) Normality
(4) Density
Which of the following is NOT a precaution to be taken while preparing a solution?
(1) Using clean apparatus
(2) Reading the meniscus at eye level
(3) Using tap water
(4) Mixing thoroughly
Which of the following is NOT a step in the preparation of a standard solution?
(1) Weighing the solute accurately
(2) Dissolving the solute in a small amount of solvent
(3) Heating the solution to boiling
(4) Diluting to the mark in a volumetric flask
Which of the following is NOT required for the preparation of a solution of known concentration?
(1) Analytical balance
(2) Volumetric flask
(3) Bunsen burner
(4) Distilled water
Fill in the blank: The __________ is the lower curved surface of a liquid in a container, used for accurate volume measurement.
Fill in the blank: The __________ of a solution is defined as the number of moles of solute per kilogram of solvent.
Fill in the blank: The apparatus commonly used to prepare a solution of known volume is a __________ flask.
Fill in the blank: The mass of solute present in 1 kg of solvent is called __________.
Is it correct to use a beaker for measuring the final volume of a solution?
Is it necessary to rinse the volumetric flask with the prepared solution before making up the final volume?
Is it necessary to use distilled water for preparing standard solutions?
True or False: A solution prepared by dissolving a known mass of solute in a known volume of solvent is called a standard solution.
