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 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?
A solution is labeled as 5% (w/v) glucose. What does this mean?
A solution is made by dissolving 3 g of KNO₃ in 97 g of water. What is the mass percent of KNO₃?
A solution is prepared by dissolving 10 g of NaCl in enough water to make 500 mL of solution. What is the mass/volume percent of NaCl in the solution?
A student adds 20 g of sugar to 180 g of water. What is the mass percent of sugar in the solution?
A student prepares a solution by dissolving 2 moles of HCl in 1 liter of water. What is the molarity of the solution?
Calculate the molarity of a solution made by dissolving 4 g of NaOH (molar mass = 40 g/mol) in enough water to make 500 mL of solution.
Calculate the number of moles of solute in 250 mL of 0.4 M NaOH solution.
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.
Explain why molality is preferred over molarity when studying the effect of temperature on concentration.
Explain why the concentration of a solution is important in chemical reactions.
What is the concentration of a solution?
What is the molarity of a solution containing 0.5 moles of KCl dissolved in 250 mL of solution?
A chemist has a 3 M HCl solution and needs to prepare 500 mL of a 1 M HCl solution. What volume of the 3 M HCl solution should be used?
A laboratory technician needs to prepare 250 mL of a 0.2 M Na₂SO₄ solution. Calculate the mass of Na₂SO₄ (molar mass = 142 g/mol) required.
