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Chemical Kinetics Average Rate of Reaction

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The concentration of a reactant decreases from 0.20 mol dm⁻³ to 0.10 mol dm⁻³ in 10 min. Its average rate of disappearance is:

Verified Answer & Explanation⌄

Correct Answer: C) 0.01 mol dm⁻³ min⁻¹

Concept Explanation

Rate = −Δ[A]/Δt = −(0.10 − 0.20)/10 = 0.01 mol dm⁻³ min⁻¹.

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