Neco Model Questions Vol1 2018 Chemistry Question 7
Practice objective / multiple choice question 7 from the 2018 Neco Model Questions Vol1 Chemistry examination.
The solubility of potassium nitrate (KNO\(_3\)) 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 (in g per 100 g water). Use the van't Hoff equation \(\ln\frac{c_2}{c_1}= -\frac{\Delta H}{R}\left(\frac{1}{T_2}-\frac{1}{T_1}\right)\) with \(R = 8.314\ \text{J mol}^{-1}\text{K}^{-1}\).
Answer Options
About This Question
This is Neco Model Questions Vol1 2018 Chemistry Question 7. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.