WAEC Chemistry 2025 Objective — Question 27
Question 27 of 50 from the West African Examinations Council (WAEC) Chemistry 2025 Objective paper, with the correct answer and a full explanation.
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If 25cm3 of a saturated solution contains 0.02 moles of the solute, calculate the solubility of the solute.
- A. 5.0x10^-4 mol dm-3
- B. 0.08 mol dm-3Correct
- C. 0.4 mol dm-3
- D. 5.0x10^-2 mol dm-3
Explanation
Mole present in solution = 0.02 moles, Volume of solution = 25 cm3 = 0.025 dm3. Solubility = 0.02 mol / 0.025 dm3 = 0.08 mol dm-3.
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