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 12
A 0.1 M NaOH solution is diluted to 1/10th of its original concentration. What is the new concentration?
A 0.5 M solution of KCl is prepared by dissolving KCl in water. If the final volume is 2 L, how many moles of KCl are present?
A 2 M solution of HCl contains 2 moles of HCl in how many liters of solution?
A chemist prepares a solution by dissolving 15 g of KNO₃ (molar mass = 101 g/mol) in 250 g of water. Calculate the molality of the solution.
A laboratory technician needs to prepare 250 mL of 0.5 M NaCl solution. How many grams of NaCl (molar mass = 58.5 g/mol) are required?
A solution contains 0.1 mol of solute in 900 g of solvent. What is the molality?
A solution contains 0.2 mol of NaCl in 800 g of water. What is the molality of the solution?
A solution contains 0.5 mol of glucose (C₆H₁₂O₆) in 1 kg of water. What is its molality?
A solution is made by dissolving 2 g of solute in 98 g of water. What is the mass percent of solute?
A solution is prepared by mixing 20 g of ethanol (C₂H₅OH) with 80 g of water. Calculate the mass percent of ethanol.
Calculate the molarity of a solution prepared by dissolving 5.85 g of NaCl (molar mass = 58.5 g/mol) in enough water to make 500 mL of solution.
Define molality and state its SI unit.
Describe how you would prepare 1 L of 1 M H₂SO₄ solution from concentrated H₂SO₄ (18 M).
Describe the difference between a saturated and an unsaturated solution in terms of concentration.
Explain why molality is preferred over molarity when studying colligative properties.
Explain why the concentration of a solution is important in chemical reactions.
Explain why the volume of a solution is not always equal to the sum of the volumes of solute and solvent.
If 10 mL of 6 M HCl is diluted to 60 mL, what is the final concentration?
If 25 mL of 4 M H₂SO₄ is mixed with 75 mL of water, what is the final concentration of H₂SO₄?
State the formula for calculating the mole fraction of a solute in a binary solution.
