Concentration Changes Over Time

AP Chemistry· difficulty 3/5

A zero-order reaction starts at [A]0 = 0.80 M with k = 0.040 M/s.

What is t1/2?

  • A

    5 s

  • B

    10 s

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  • C

    20 s

  • D

    depends on temperature only

Explanation

Zero-order: t1/2 = [A]0/(2k) = 0.80/(2·0.040) = 10 s.

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