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Introduction to Rate Law

AP Chemistry· difficulty 2/5

Using the same data set from cluster c4-q1, calculate k.

Trial 1: [A]=0.10 M, rate=2.0×10⁻³ M/s Rate law: rate = k[A]² Solve for k.

Calculate the rate constant k.

  • A

    0.20 M⁻¹·s⁻¹

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  • B

    2.0 M⁻¹·s⁻¹

  • C

    0.020 s⁻¹

  • D

    2.0×10⁻² M⁻¹·s⁻¹

Explanation

k = rate/[A]² = (2.0×10⁻³)/(0.10)² = 2.0×10⁻³/0.010 = 0.20 M⁻¹·s⁻¹.

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