Concentration of Solutions Quiz
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5 questions, one answer each
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1. What is the correct definition of concentration in chemistry?
- A. The amount of solute dissolved in a given volume of solution, measured in mol/dm³ or g/dm³
- B. The mass of the solvent used to make a solution
- C. The temperature at which a solute dissolves in water
- D. The number of atoms present in a solution
2. Convert 250 cm³ to dm³.
- A. 0.25 dm³
- B. 2.5 dm³
- C. 25 dm³
- D. 2500 dm³
3. A solution contains 2 moles of sodium chloride dissolved in 500 cm³ of solution. Calculate the concentration in mol/dm³.
- A. 0.25 mol/dm³
- B. 1 mol/dm³
- C. 4 mol/dm³
- D. 2 mol/dm³
4. A solution has a concentration of 5 mol/dm³ and a volume of 2 dm³. How many moles of solute are present?
- A. 2.5 moles
- B. 10 moles
- C. 0.4 moles
- D. 7 moles
5. A solution contains 49 g of sulphuric acid (H₂SO₄) in 500 cm³ of solution. Calculate the concentration in mol/dm³. (Mr of H₂SO₄ = 98)
- A. 0.1 mol/dm³
- B. 0.5 mol/dm³
- C. 1.0 mol/dm³
- D. 2.0 mol/dm³