The concentration of a reactant decreases from 1.2 x10-3 M to 6.0 x10-4 M in 24 hours. Then it decreases to 3.0 x10-4 M in another 48 hours. What is the value of the rate constant?

3.47 × 10¹ M⁻¹ h⁻¹

Explanation:

From the question, it's clearly depicted that it is a second order reaction rate.

NOW, rate constant for second order reaction can be given as:

k(t)=

Given that:

t = 24 hours

Let the initial concentration of reactant

Final concentration

∴

k(t)=

k(24)hours = 833.33 M⁻¹

k =

k = 34.72 M⁻¹ h⁻¹

k = 3.472 × 10¹ M⁻¹ h⁻¹

∴ the value of the rate constant (k) = 3.472 × 10¹ M⁻¹ h⁻¹

h let me think