Different Methods for Expressing the Concentration of Solution (Molality, Molarity, Mole Fraction,..)
Different Methods for Expressing the Concentration of Solution (Molality, Molarity, Mole Fraction,..) MCQ Questions
1.
Molarity of a solution is defined as the number of moles of solute dissolved in:
ANSWER :
C. 1 litre of solution
2.
Calculate the molarity of a solution containing 5 g of NaOH in 450 mL of solution.
3.
What is the molarity of pure water (density = 1 g/mL)?
4.
30 mL of 0.5 M H₂SO₄ is diluted to 500 mL. What is the molarity of the diluted solution?
5.
Molarity of a solution changes with temperature because:
A.
Mass of solute changes with temperature
B.
Volume of solution changes with temperature
C.
Mass of solvent changes with temperature
D.
Moles of solute change with temperature
ANSWER :
B. Volume of solution changes with temperature
6.
What mass of Na₂CO₃ is required to prepare 250 mL of 0.1 M solution? (Molar mass = 106 g/mol)
