Question

A reaction was found to be zero order in A. Increasing the concentration of A by a factor of 3 will cause the reaction rate to ________.

(A) remain constant
(B) decrease by a factor of the cube root of 3
(C) increase by a factor of 9
(D) triple increase by a factor of 27

Answer 1

Answer:

Increasing the concentration of A by a factor of 3 will cause the reaction rate to (A) remain constant.

Explanation:

If the reaction order for A is zero, it means that the rate of the reaction is independent of A. The rate law would be:

r = k . [A]⁰ = k

where,

r is the rate of the reaction

k is the rate constant

and [A] is raised to its reaction order (zero)

Increasing the concentration of A by 3 would result in no effect on the reaction rate, as we can see in the rate law:

r = k . [3 A]⁰ = k .1 = k

Answer 2

If a reaction is found to be zero order in A, Increasing the concentration of A by a factor of 3 will cause the reaction rate to remain constant.

A zero order reaction is one in which the rate of reaction is independent of the concentration of reactants. Having said that, if we have a reaction in which the order of reaction in any of the reactants is zero, changing the concentration of that reactant has no effect on the rate of reaction.

Therefore, if a reaction is found to be zero order in A, Increasing the concentration of A by a factor of 3 will cause the reaction rate to remain constant.

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