Neco Model Questions Vol1 2020 Chemistry Question 15
Practice objective / multiple choice question 15 from the 2020 Neco Model Questions Vol1 Chemistry examination.
In the acid‑catalysed esterification of acetic acid with ethanol, the rate law is first order in \([\text{CH}_{3}\text{COOH}]\) and first order in \([\text{H}_{2}\text{SO}_{4}]\), zero order in ethanol. At 60 °C, with \([\text{CH}_{3}\text{COOH}]=0.20\ \text{M}\) and \([\text{H}_{2}\text{SO}_{4}]=0.050\ \text{M}\), the initial rate is \(2.5\times10^{-5}\ \text{M s}^{-1}\). Raising the temperature to 80 °C doubles the rate constant \(k\). Assuming the concentrations remain unchanged, calculate the time required for \([\text{CH}_{3}\text{COOH}]\) to decrease from 0.20 M to 0.10 M at 80 °C.
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This is Neco Model Questions Vol1 2020 Chemistry Question 15. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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