Waec Model Questions Vol1 2022 Chemistry Question 49
Practice objective / multiple choice question 49 from the 2022 Waec Model Questions Vol1 Chemistry examination.
A saturated solution of potassium nitrate (KNO₃) contains 31.6 g KNO₃ per 100 g water at 20 °C and 109 g KNO₃ per 100 g water at 60 °C. A student prepares 250 g of the solution at 20 °C, then heats it to 60 °C and adds solid KNO₃ until the solution becomes saturated at 60 °C. (i) How many grams of additional KNO₃ can dissolve? (ii) What is the mass percent of KNO₃ in the final saturated solution at 60 °C?
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About This Question
This is Waec Model Questions Vol1 2022 Chemistry Question 49. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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