On a concentration/time graph of a chemical reaction, what does a steep gradient of the line indicate?

A steep line signifies that the rate of reaction was fast.

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Why do concentration/time graphs plateau?

The graph plateaus as the reactants are used up.

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What is the formula to find the gradient of a line?

Gradient = Change in y ÷ Change in x

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How do you find the rate of reaction at a particular point on a concentration/time graph?

  1. Draw a tangent to the line at that point.
  2. Calculate the gradient of the tangent by picking 2 points on the line and doing 'change in y ÷ change in x'.
  3. The gradient of this tangent is the rate.

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