Waec Model Questions Vol1 2021 Chemistry Question 49
Practice objective / multiple choice question 49 from the 2021 Waec Model Questions Vol1 Chemistry examination.
A salt has a solubility of 12 g per 100 g water at 25 °C. Its enthalpy of solution is +15 kJ mol⁻¹ (assumed constant over the temperature range). The molar mass of the salt is 120 g mol⁻¹. Estimate its solubility at 45 °C using the van't Hoff equation ln(S₂/S₁) = -ΔH/R (1/T₂ - 1/T₁).
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About This Question
This is Waec Model Questions Vol1 2021 Chemistry Question 49. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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