Concentration

6.5 Concentration of Aqueous Solution

Multiple Choice

Which statement is correct about the concentration of a solution in g dm^-3?

• The quantity of solute in a given volume of solution

• The number of moles of solute in a given volume of solution

• The mass of one mole of solution in gram

• The number of solute particles that is present in one mole of solution

Multiple Choice

Find the molarity of a sodium sulphate, Na₂SO₄ solution with a concentration of 28.4 g dm^-3.

[RAM: Na = 23; O = 16; S = 32]

• $$0.2\ mol\ dm^{-3}$$

• $$0.5\ mol\ dm^{-3}$$

• $$2\ mol\ dm^{-3}$$

• $$5\ mol\ dm^{-3}$$

Multiple Choice

Calculate the number of moles of hydrochloric acid in 0.5 dm³ of 0.02 M solution.

• $$0.04\ mol$$

• $$0.03\ mol$$

• $$0.02\ mol$$

• $$0.01\ mol$$

Multiple Choice

Find the mass of sodium hydroxide should be dissolved in water to prepare a 250 cm³ of solution containing 50 g dm^-3?

• $$0.2\ g$$

• $$5.0\ g$$

• $$12.5\ g$$

• $$25.0\ g$$

Multiple Choice

Which solution contains the greatest number of hydrogen ions?

• 0.3 dm³ of 2.0 mol dm^-3 sulphuric acid

• 0.4 drn³ of 2.0 mol dm^-3 nitric acid

• 0.5 dm³ of 2.0 mol dm^-3 hydrochloric acid

• 0.6 dm³ of 2.0 mol dm^{- 3} ethanoic acid

Multiple Choice

Which solution contains the greatest number of hydrogen ions?

• 0.3 dm³ of 2.0 mol dm^-3 sulphuric acid

• 0.4 drn³ of 2.0 mol dm^-3 nitric acid

• 0.5 dm³ of 2.0 mol dm^-3 hydrochloric acid

• 0.6 dm³ of 2.0 mol dm^{- 3} ethanoic acid