Flashcards for the AQA A level chemistry A levels 2025 exam series
| FrontText | Why does a large excess of a reactant make that reactant zero order? |
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| BackText | The concentration of the reactant is very large compared to (....) and so is effectively constant so there is no effect on the rate. |
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| FrontText | Why does the C-F bond of CF₃Cl not break in the atmosphere ? |
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| BackText | C-F bond is too strong. |
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| FrontText | What is catalyst poisoning? |
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| BackText | Impurities irreversibly adsorb to the catalyst's active sites. This blocks the active sites on the catalyst's surface. |
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