Concentration Changes Over Time

AP Chemistry· difficulty 3/5

A plot of 1/[A] vs t produces a straight line with positive slope.

time (s) 1/[A] 1/[A] vs t

The reaction is best described as which order, and what does the slope represent?

  • A

    Second order; slope = -k

  • B

    Zero order; slope = k

  • C

    Second order; slope = k

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  • D

    First order; slope = -k

Explanation

For second-order: 1/[A] = 1/[A]0 + kt, so a linear plot with positive slope = k.

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