The reaction A B + C is known to be zero order in A with a rate constant of 5.0 x 10-2 mol/L.s...

Question:

The reaction A {eq}\rightarrow {/eq} B + C is known to be zero order in A with a rate constant of 5.0 {eq}\times {/eq} 10{eq}^{-2} {/eq} mol/L.s at 25 {eq}^{\circ} {/eq}C. An experiment was run at 25 C where {eq}\left [ A \right ] {/eq}0 = 1.0 x 10{eq}^{-3} {/eq} M. What is the concentration of B after 5 x 10{eq}^{-3} {/eq} sec?

A. 5.0 x 10{eq}^{-4} {/eq} M

B. 7.5 x 10{eq}^{-4} {/eq} M

C. 5.0 x 10{eq}^{-5} {/eq} M

D. 2.5 x 10{eq}^{-4} {/eq} M

E. None of these choices are correct.

Zero Order Reaction:

The rate constant is independent of the concentration of the reactant for the zero order reaction. For the zero order reaction, the half-life is directly proportional to the initial concentration. The half-life of the reaction is decreased to the half value.

Answer and Explanation:

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The equation for the dissociation of A is as follows:

{eq}A\rightarrow B+C {/eq}

The expression to concentration of {eq}\left [ A \right...

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Zero Order Kinetics: Definition, Pharmacology & Examples

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Chapter 4 / Lesson 2
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This lesson helps you apply the principle of zero order kinetics, which is a way of describing how the body breaks down some types of medicine. You can use this knowledge to predict how long certain medicines will last when they're given to a patient.


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