Concentration Changes Over Time

AP Chemistry· difficulty 2/5

A reaction A -> products is monitored over time, and [A] is plotted against t. The plot is shown to be a straight line with negative slope.

time (s) [A] [A] vs t

What is the order of the reaction with respect to A?

  • A

    Zero order

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  • B

    Second order

  • C

    Third order

  • D

    First order

Explanation

A linear plot of [A] vs t indicates zero-order kinetics: [A] = [A]0 - kt.

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