Waec Model Questions Vol1 2019 Chemistry Question 19
Practice objective / multiple choice question 19 from the 2019 Waec Model Questions Vol1 Chemistry examination.
A river receives wastewater containing phenol at a concentration of 0.80 mg·L⁻¹. The wastewater flow rate is 5.0×10³ L·day⁻¹ and the river flow rate is 2.0×10⁵ L·day⁻¹. Phenol degrades in the river by first‑order kinetics with a rate constant k = 0.15 day⁻¹. Assuming complete mixing, calculate the phenol concentration in the river water after the mixture has travelled for 3 days.
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About This Question
This is Waec Model Questions Vol1 2019 Chemistry Question 19. It is a objective / multiple choice question from the 2019 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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