Question

Which of following statement is correct? a. The half life of first order reaction is independent...

Which of following statement is correct?

a. The half life of first order reaction is independent of the initial concentrations of the reactants

b. The half-life of a first order and zero order reaction are both always independent of the initial concentrations of the reactants

c. The half-life of a zero order reaction is independent of the initial concentration of the reactants.

d. The half-life of a first order reaction is always dependent of the initial concentrations of the reactants

I need help!!!!!

Homework Answers

Answer #1

The half time of zero order of reaction is following:

t1/2=[A]o/ 2k

For zero-order reactions, the half-life depends on the initial concentration of reactant and the rate constant.

The half time of firstorder of reaction is following:

t1/2=ln2/ k≈ 0.693/ k

This indicates that the half-life of a first-order reaction is a constant and not depending on the initial concentration.

Hence the correct answer is a. The half life of first order reaction is independent of the initial concentrations of the reactants

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