Explain how the rate of reaction depends on concentration and time using graphs.
(N/A) The rate of a reaction depends on the change in concentration of reactants or products over a specific time interval. This is illustrated by the following graphs:
| Feature | Reactant Concentration vs Time | Product Concentration vs Time |
| :--- | :--- | :--- |
| Average Rate $(R_{av})$ | $R_{av} = -\frac{\Delta[R]}{\Delta t} = -\frac{[R_2] - [R_1]}{t_2 - t_1}$ | $R_{av} = \frac{\Delta[P]}{\Delta t} = \frac{[P_2] - [P_1]}{t_2 - t_1}$ |
| Concentration Trend | Decreases with time | Increases with time |
| Slope | Negative | Positive |
| Initial State | Intercept = $[R]_0$ (Maximum) | Intercept = $0$ (Zero) |
As shown in the graphs,the rate of reaction is determined by the slope of the tangent to the curve at any given time $t$ $(r_{inst} = \pm \frac{d[concentration]}{dt})$.
| Feature | Reactant Concentration vs Time | Product Concentration vs Time |
| :--- | :--- | :--- |
| Average Rate $(R_{av})$ | $R_{av} = -\frac{\Delta[R]}{\Delta t} = -\frac{[R_2] - [R_1]}{t_2 - t_1}$ | $R_{av} = \frac{\Delta[P]}{\Delta t} = \frac{[P_2] - [P_1]}{t_2 - t_1}$ |
| Concentration Trend | Decreases with time | Increases with time |
| Slope | Negative | Positive |
| Initial State | Intercept = $[R]_0$ (Maximum) | Intercept = $0$ (Zero) |
As shown in the graphs,the rate of reaction is determined by the slope of the tangent to the curve at any given time $t$ $(r_{inst} = \pm \frac{d[concentration]}{dt})$.
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