Three elementary reactions were studied at the same temperature

CHEMISTRY · Multi-part · A Level · Chemistry · Rate equations · Rate equations

Problem

Three elementary reactions were studied at the same temperature. Their experimentally determined rate laws are shown below, each accompanied by an unlabeled set of units for the rate constant. Reaction I: rate=kI[A]2\text{rate}=k_{\text{I}}[\text{A}]^{2} Reaction II: rate=kII[B]1[C]2\text{rate}=k_{\text{II}}[\text{B}]^{1}[\text{C}]^{2} Reaction III: rate=kIII[D]\text{rate}=k_{\text{III}}[\text{D}] Unlabeled unit sets: Unit set P: mol−2 L2 s−1\text{mol}^{-2}\,\text{L}^{2}\,\text{s}^{-1} Unit set Q: s−1\text{s}^{-1} Unit set R: L mol−1 s−1\text{L}\,\text{mol}^{-1}\,\text{s}^{-1} (a) Match reactions to unit sets with justification. (b) Conceptual explanation of differing rate-constant units.

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