A reaction between species A and B is proposed to occur by the following mechanism

CHEMISTRY · Single correct · A Level · Chemistry · Rate equations · Rate equations

Problem

A reaction between species A and B is proposed to occur by the following mechanism, whose first step is rate-determining: 2 A(g)+B(g)→C(g)    (slow)\mathrm{2\,A(g) + B(g) \rightarrow C(g)} \;\; (\text{slow}) Which of the following best describes how doubling the concentration of A while keeping [B] constant will affect the initial rate? (a) The rate will increase by a factor of eight. (b) The rate will double. (c) The rate will increase by a factor of four. (d) The rate will remain unchanged.

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