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    I need to find the initial gradient (at t=0) of a concentration against time graph, but it's very difficult when the line doesn't continue backwards. Is there a way to make it easier to find the initial gradient? Something like plotting log(concentration) against time?

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    Which function of concentration will provide a linear plot depends on the order of reaction. If it's zero order then [conc] vs time is linear. If it's first order then log[conc] versus time is linear. If it's second order then 1/[conc] vs time is linear.

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