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 9
Describe how you would prepare 250 mL of 0.5 M KNO3 solution. (K = 39, N = 14, O = 16)
Describe the difference between a saturated and an unsaturated solution.
Describe the steps to prepare 100 mL of 1 M HCl solution from concentrated HCl.
Explain why it is important to add the solute to the solvent and not the other way around when preparing a solution.
Which apparatus is best for measuring the volume of a liquid accurately when preparing a solution?
(1) Beaker
(2) Measuring cylinder
(3) Volumetric flask
(4) Test tube
Which of the following is a concentrated solution?
(1) 0.1 M NaCl
(2) 1 M NaCl
(3) 0.01 M NaCl
(4) 0.001 M NaCl
Which of the following is a correct method to ensure complete dissolution of a solute?
(1) Stirring the solution
(2) Heating the solution
(3) Crushing the solute
(4) All of the above
Which of the following is NOT a method to increase the rate of dissolution of a solid in a liquid?
(1) Stirring
(2) Decreasing temperature
(3) Crushing the solid
(4) Increasing temperature
Which of the following is NOT a reason for filtering a solution after preparation?
(1) To remove undissolved solids
(2) To increase concentration
(3) To obtain a clear solution
(4) To remove impurities
Which of the following is NOT required to prepare a standard solution?
(1) A balance
(2) A volumetric flask
(3) A thermometer
(4) Distilled water
Which of the following is the best way to ensure accuracy when preparing a solution?
(1) Use approximate measurements
(2) Use precise instruments like volumetric flasks and pipettes
(3) Estimate by eye
(4) Use any available container
Which of the following is the first step in preparing a solution of a given concentration?
(1) Weighing the solute
(2) Adding solvent
(3) Stirring the mixture
(4) Filtering the solution
Fill in the blank: A __________ solution contains the maximum amount of solute that can dissolve at a given temperature.
Fill in the blank: A solution that contains less solute than it can hold at a given temperature is called __________.
Fill in the blank: The __________ is the component present in the largest amount in a solution.
Fill in the blank: The concentration of a solution is the amount of __________ present in a given quantity of solvent or solution.
Is it necessary to use distilled water when preparing a solution for a chemical experiment? Yes or No.
Is it possible to prepare a solution by mixing two immiscible liquids? Yes or No.
True or False: A solution is always a liquid.
True or False: The concentration of a solution can be changed by evaporation of the solvent.
