Waec Model Questions Vol1 2025 Chemistry Question 17
Practice objective / multiple choice question 17 from the 2025 Waec Model Questions Vol1 Chemistry examination.
The solubility of potassium nitrate (KNO₃) is 32 g per 100 g water at 25 °C and 65 g per 100 g water at 60 °C. A 250.0 g sample of water at 25 °C is saturated with KNO₃. Then 20.0 g of solid KNO₃ is added and the mixture is heated to 60 °C. After cooling back to 25 °C, excess solid precipitates. What mass of KNO₃ crystallises out on cooling?
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About This Question
This is Waec Model Questions Vol1 2025 Chemistry Question 17. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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