Solutions of two compounds, P\text{P}P and Q\text{Q}Q, react together in the presence of a soluble catalyst, S\text{S}S, as shown in the equation:
P+2Q→R \text{P} + 2\text{Q} \rightarrow \text{R} P+2Q→RWhen the concentrations of P\text{P}P, Q\text{Q}Q, and S\text{S}S are all doubled, the rate of reaction increases by a factor of eight.
Which is a possible rate equation for this reaction?
rate=k[P][Q]\text{rate} = k [\text{P}] [\text{Q}]rate=k[P][Q]
rate=k[Q]2[S]\text{rate} = k [\text{Q}]^2 [\text{S}]rate=k[Q]2[S]
rate=k[P]2[Q]2\text{rate} = k [\text{P}]^2 [\text{Q}]^2rate=k[P]2[Q]2
rate=k[P][S]\text{rate} = k [\text{P}] [\text{S}]rate=k[P][S]
