Question

Consider a certain reaction A → Products with k = 2.0 × 10−2 s−1. Calculate the concentration of A remaining after 100 s if the initial concentration of A is 1.0 mol L−1.

Answer 1

Hey Dear,

◆ Answer -

[A] = 0.1353 mol/L

● Explaination -

# Given -

k = 2×10^-2 s^-1

t = 100 s

[A0] = 1 mol/L

# Solution -

Concentration of A remaining after 100 s is calculated by -

[A] = [A0].e^(-kt2)

[A] = 1 × e^(-2×10^-2 × 100)

[A] = e^-2

[A] = 0.1353 mol/L

Hope this helps you. Thanks dear...

Answer 2

Explanation:

Consider a certain reaction A → Products with k = 2.0 x 10 -2 s -1

Calculate the concentration of A remaining after 100 s if the initial concentration of A is 1.0 mol L-1.

Since the unit of kis s - 1, the given reaction is a first order reaction.

Hence, the remaining concentration of A is 0.135 mol L - 1.