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 solution contains 0.1 mol of solute in 900 g of solvent. What is the molality?
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?
If 25 mL of 4 M H₂SO₄ is mixed with 75 mL of water, what is the final concentration of H₂SO₄?
A laboratory technician accidentally adds 10 mL of water to a 100 mL sample of 0.5 M H2SO4. What is the new concentration of H2SO4?
Which of the following concentration terms is temperature dependent? (1) Molarity (2) Molality (3) Mole fraction (4) Mass percent
Which of the following is a colligative property that depends on the concentration of solute particles? (1) Boiling point elevation (2) Color (3) Odor (4) Density
Which of the following is NOT a unit of concentration? (1) ppm (2) molarity (3) kg/L (4) molality
Which of the following is NOT a way to express concentration? (1) Molarity (2) Density (3) Molality (4) Mole fraction
A solution contains 10 g of NaCl dissolved in 90 g of water. The mass percent of NaCl in the solution is ________%.
A solution is labeled as 5% (w/v) NaCl. This means there are 5 g of NaCl in ________ mL of solution.
Fill in the blank: A solution with a high amount of solute compared to solvent is called a ________ solution.
Fill in the blank: The concentration of a solution in terms of moles of solute per kilogram of solvent is called ________.
The mole fraction of solute in a solution is always less than 1. True or False?
True or False: Parts per million (ppm) is commonly used to express very low concentrations.
True or False: The concentration of a solution can be expressed as mass percent.
True or False: The mole fraction of all components in a solution always adds up to 1.
