Another useful expression can be obtained by subtracting equation (B) from (A). We obtain
2 rate| — 2 rate2 + 2 rate3 = 0
which by rearrangement and cancellation becomes rate3 = rate2 — ratej
It is known from experiment that rate2 (and rate3) is much larger than ratej, so the latter can be neglected here, giving simply rate3 — rate2
Using the expressions for these two reaction rates in terms of the concentrations of their reactants,
Continue reading here: K3[03 k2[0[02[M
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