The molarity of Co ( NH 3 ) 5 Br 2+ after the given reaction time has to be calculated. Concept introduction: Integrated rate law for a first order reaction: A first order reaction is defined as the reaction whose rate depends only on the concentration of a single reactant raised to the first power. Rate = - Δ [ A ] Δt = k [ A ] Integrated rate law for a first order reaction is given below ln [ A ] t [ A ] 0 = - kt where, ln - natural logarithm [ A ] 0 - concentration of A at time t = 0 [ A ] t - concentration of A after time t k - rate constant

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Chapter 12.4, Problem 12.7P

(a)

Interpretation Introduction

Interpretation:

The molarity of Co(NH3)5Br2+ after the given reaction time has to be calculated.

Concept introduction:

Integrated rate law for a first order reaction:

A first order reaction is defined as the reaction whose rate depends only on the concentration of a single reactant raised to the first power.

Rate = - Δ[A]Δt = k [A]

Integrated rate law for a first order reaction is given below

ln [A]t[A]0 = - ktwhere, ln - natural logarithm [A]0 - concentration of A at time t = 0 [A]t - concentration of A after time t k - rate constant

(b)

Interpretation Introduction

Interpretation:

The time required for 75 % of the Co(NH3)5Br2+ molecule react has to be calculated.

Concept introduction:

Integrated rate law for a first order reaction:

A first order reaction is defined as the reaction whose rate depends only on the concentration of a single reactant raised to the first power.

Rate = - Δ[A]Δt = k [A]

Integrated rate law for a first order reaction is given below

ln [A]t[A]0 = - ktwhere, ln - natural logarithm [A]0 - concentration of A at time t = 0 [A]t - concentration of A after time t k - rate constant

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