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- The quantity 1/t can be plotted against the varying concentrations of the reactant of interest. If the reaction is first order with respect to that substance, then a straight line results; in a first order reaction, the rate is proportional to the concentration. If a curve results, the reaction is not first order.
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Feb 13, 2023 · Having eliminated zeroth-order and first-order behavior, we construct a plot of 1/[NO 2] versus t (part (c) in Figure \(\PageIndex{1}\)). This plot is a straight line, indicating that the reaction is second order in NO 2. Figure \(\PageIndex{1}\): The Decomposition of NO 2.
- Order of Reaction Experiments
The quantity 1/t can be plotted against the varying...
- First-Order
ln[A] = − kt + ln[A]o. To test if it the reaction is a...
- Order of Reaction Experiments
You can then plot 1/t as a measure of rate against the varying concentrations of the reactant you are investigating. If the reaction is first order with respect to that substance, then you would get a straight line.
Feb 13, 2023 · The quantity 1/t can be plotted against the varying concentrations of the reactant of interest. If the reaction is first order with respect to that substance, then a straight line results; in a first order reaction, the rate is proportional to the concentration. If a curve results, the reaction is not first order.
Feb 13, 2023 · ln[A] = − kt + ln[A]o. To test if it the reaction is a first-order reaction, plot the natural logarithm of a reactant concentration versus time and see whether the graph is linear. If the graph is linear and has a negative slope, the reaction must be a first-order reaction.
Example of graphing first-order rate data to see a linear relationship, and calculating rate constant k from the slope. Watch the next lesson: https://www.khanacademy.org/science/c...
- 9 min
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- Khan Academy Organic Chemistry
For a first order reaction, as shown in the following figure, the plot of the logrithm of [A] versus time is a straight line with k = - slope of the line. Other graphs are curved for a first order reaction.
A plot of ln[A] versus t for a first-order reaction is a straight line with a slope of −k and an intercept of ln[A] 0. If a set of rate data are plotted in this fashion but do not result in a straight line, the reaction is not first order in A.