Nat 5- Rates of reaction

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What can be measured to follow the progress of chemical reactions?

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Changes in mass, volume, and other quantities.

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What can graphs of chemical reactions be interpreted in terms of?

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End-point of a reaction, quantity of product, quantity of reactant used, effect of changing conditions.

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How can rates of reaction be increased?

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By increasing the temperature, increasing the concentration of a reactant, increasing surface area/decreasing particle size, and through the use of a catalyst.

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What are catalysts?

Back

Substances that speed up chemical reactions but can be recovered chemically unchanged at the end of the reaction.

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How is the average rate of a chemical reaction calculated?

Back

Average rate of reaction = change in quantity / change in time.

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What happens to the rate of a reaction over time?

Back

The rate of a reaction can be shown to decrease over time by calculating the average rate at different stages of the reaction.

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0.8 cm3 s-1