Concentration of Solutions
Chemistry ⇒ Solutions and Colloids
Concentration of Solutions starts at 9 and continues till grade 12.
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See sample questions for grade 9
A solution is labeled as 5% (w/v) glucose. What does this mean?
Describe one method to prepare a solution of known concentration.
Describe what happens to the concentration of a solution if more solute is added without changing the volume.
Explain the difference between a concentrated and a dilute solution.
A chemist dissolves 5 g of salt in 95 g of water. What is the mass percent of salt in the solution?
A solution contains 0.1 mol of glucose in 1 kg of water. What is its molality?
A solution contains 0.25 moles of solute in 500 mL of solution. What is its molarity?
A solution contains 15 g of solute in 85 g of solvent. What is the mass percent of solute?
Which of the following best describes a dilute solution? (1) Contains a small amount of solute (2) Contains a large amount of solute (3) Is always saturated (4) Is always supersaturated
Which of the following is a correct way to prepare 1 L of 1 M NaCl solution? (1) Dissolve 58.5 g NaCl in 1 L water (2) Dissolve 58.5 g NaCl and add water to make 1 L solution (3) Dissolve 1 g NaCl in 1 L water (4) Dissolve 58.5 g NaCl in 500 mL water
Which of the following is NOT a common unit for expressing concentration? (1) Molarity (2) Molality (3) Kilogram (4) Mass percent
Which of the following is NOT a factor that affects the concentration of a solution? (1) Amount of solute (2) Amount of solvent (3) Color of solute (4) Temperature
Fill in the blank: A solution in which no more solute can dissolve at a given temperature is called a ______ solution.
Fill in the blank: Molarity (M) is defined as the number of ______ of solute per liter of solution.
Fill in the blank: The concentration of a solution can be decreased by adding more ______.
Fill in the blank: The number of moles of solute per kilogram of solvent is called ______.
True or False: A saturated solution contains the maximum amount of solute that can dissolve at a given temperature.
True or False: A solution with a high concentration of solute is always saturated.
True or False: Molality depends on the volume of the solution.
True or False: The concentration of a solution can be changed by changing the temperature.
