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During a kinetic trial, when the absolute initial concentration of the sole reactant is intentionallChemical Kinetics Chemistry Question

Question

During a kinetic trial, when the absolute initial concentration of the sole reactant is intentionally doubled, the experimentally recorded half-life ($t_{1/2}$) is also exactly doubled. Determine the overall kinetic order of this reaction.

Answer: A

💡 Solution & Explanation

Utilizing the master half-life proportionality $t_{1/2} \propto a^{1-n}$. The data dictates a direct, linear proportionality where $t_{1/2} \propto a^1$. Equating the exponents yields $1 - n = 1$, which strictly implies $n = 0$. The reaction is zero-order.

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