In a reaction involving one single reactant, the fraction of the reactant consumed may be defined as f=(1−CC0) where C0 and C are the concentrations of the reactant at the start and after time, t. For a first order reaction.
A
dfdt=k(1−f)
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B
−dfdt=kf
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C
−dfdt=k(1−f)
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D
dfdt=kt
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Solution
The correct option is Bdfdt=k(1−f) We need to substitute the differential rate law: