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8 Cards in this Set
- Front
- Back
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What is le Chatelier's principle? |
When a system in dynamic equilibrium is subjected to an external change, the system readjusts itself to minimise the effect of the change and restore equilibrium. |
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What are the features of a dynamic equilibrium? |
It's in a closed system. The rates of forward and reverse reactions are equal. Concentrations don't change |
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How do you work out equilibrium constant in this reaction: aA+bB↔️cC+dD? |
[C]^c[D]^d/[A]^a[B]^b |
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What do different values of Kc represent? |
=1 position of equilibrium is half way between reactants and products. >1 towards products <1 towards reactants. |
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Dichromate/ chromate reaction with concentration as an example |
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Temperature with cobalt chloride as example. |
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Effect of pressure on position of equilibrium with nitrogen oxides as an example. |
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Describe the Haber process- include temperature, pressure. |
Exothermic reaction, so low temperature produces high yield. 450C typical. Less molecules of gas on right, so high pressure produces highest yield. 200 ATM typical. |
