Waec Model Questions Vol1 2018 Chemistry Question 38

Practice objective / multiple choice question 38 from the 2018 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2018 Chemistry Objective / Multiple Choice Medium Difficulty
Question 38 WAEC_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • objective

The solubility of potassium nitrate (KNO₃) in water is 31.6 g per 100 g water at 20 °C and 45.8 g per 100 g water at 40 °C. Assuming the enthalpy of solution is constant over this temperature range, estimate the solubility at 60 °C.

Answer Options

Correct Answer A. 63 g per 100 g water
B. 55 g per 100 g water
C. 48 g per 100 g water
D. 70 g per 100 g water
Correct Answer
A
Correct Option:
63 g per 100 g water

About This Question

This is Waec Model Questions Vol1 2018 Chemistry Question 38. It is one of the objective questions from the 2018 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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