Question

The rate equation for a reaction between substances C and D is:

rate = k[C]^2 [D]^2
The initial rate is found to be 7.5 x 10^-3mol dm^-3s^-1when the initial concentration of
C is of 0.25 mol dm^-3and the initial concentration of D is 0.50 mol dm^-3.
Calculate the value of the rate constant, k, at this temperature and deduce its units.
*Important Asap please *

Answer 1

`rate = k[C] {}^(2) [D] {}^(2) \\ 7.5 * {10}^( - 3) = k {(0.25)}^(2) {(0.50)}^(2) \\ k = \frac{7.5 * {10}^( - 3) }{ {(0.25)}^(2) {(0.50)}^(2) } \\ k = 0.48 \: {mol}^( - 3) {dm}^(9) {s}^( - 1)`