Waec Model Questions Vol1 2019 Chemistry Question 8
Practice essay / theory question 8 from the 2019 Waec Model Questions Vol1 Chemistry examination. This question covers solubility, temperature effect, quantitative analysis .
A laboratory set‑up is used to determine the solubility of potassium nitrate (KNO₃) in water at different temperatures. The apparatus consists of a thermostatically controlled water bath, a 250 mL beaker, a thermometer, a glass stirring rod and an analytical balance as shown in the labelled diagram. The procedure is carried out at three temperatures and the following data are obtained for the mass of KNO₃ that can dissolve in 100 g of water: • 30 °C : 32 g KNO₃ • 50 °C : 55 g KNO₃ • 70 °C : 86 g KNO₃ Answer the following questions.
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This is Waec Model Questions Vol1 2019 Chemistry Question 8. It is one of the essay questions from the 2019 Waec Model Questions Vol1 Chemistry examination.
The question covers solubility, temperature effect, quantitative analysis .
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