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 one of the objective questions from the 2019 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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