The rate equation for the reaction between two reactants, P\text{P}P and Q\text{Q}Q, is:
rate=k[P][Q]2 \text{rate} = k[\text{P}][\text{Q}]^2 rate=k[P][Q]2Define the term overall order of reaction.
Deduce the overall effect on the rate of reaction when the concentration of P\text{P}P is halved and the concentration of Q\text{Q}Q is quadrupled.
At a certain temperature, the rate of reaction is 0.03375 mol dm−3 s−10.03375\text{ mol dm}^{-3}\text{ s}^{-1}0.03375 mol dm−3 s−1 when the concentration of P\text{P}P is 0.120 mol dm−30.120\text{ mol dm}^{-3}0.120 mol dm−3. Calculate the concentration of Q\text{Q}Q if the rate constant, kkk, is 12.5 mol−2 dm6 s−112.5\text{ mol}^{-2}\text{ dm}^6\text{ s}^{-1}12.5 mol−2 dm6 s−1.
