The first order integrated rate equation is

  • A
    $k = \frac{x}{t}$
  • B
    $k = -\frac{2.303}{t} \log \frac{a}{a-x}$
  • C
    $k = \frac{1}{t} \ln \frac{a}{a-x}$
  • D
    $k = \frac{1}{t} \frac{x}{a(a-x)}$

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