Question

In a reaction, 2A → Products, the concentration of A decreases from 0.5 mol L⁻¹ to 0.4 mol L⁻¹ in 10 minutes. Calculate the rate during this interval?

Answer 1

Average rate  = -`1/2 (triangle[A])/(trianglet)`

= - `1/2 ([A]_2- [A]_1)/(t_2-t_1)`

= -`1/2 (0.4-0.5)/10`

= -`1/2 (-0.1)/10`

= 0.005 mol L⁻¹ min⁻¹

= 5 × 10⁻³ M min⁻¹