Zero Order

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Characteristic of zero-order reaction:

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1. **Rate Equation**: For a zero-order reaction, $Rate = k[A]^0 = k$.
2. **Concentration Influence**: Since $[A]^0 = 1$, the rate remains **constant** regardless of the concentration of the reactants.
3. **Mechanism**: This often occurs in surface-catalyzed reactions or when the substrate concentration saturates the enzyme/catalyst site.
4. **Graphical Represeantion**: A plot of $[A]$ vs time is a straight line with slope $-k$.
5. **Half-life**: $t_{1/2} = \frac{[A]_0}{2k}$, which actually DOES depend on initial concentration, but the defining 'characteristic' is the concentration-independent rate.

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Zero Order

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For a zero-order reaction, the plot of concentration vs time is:

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