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 a objective / multiple choice question from the 2025 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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