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Equilibria
AQA A Level Chemistry
| Question | Answer |
|---|---|
| Define a dynamic equilibrium. | An reversible reaction in a closed system where both the forward and reverse reaction have the same rate. The concentration of reactants and products remains the same |
| What effect does a catalyst have on the equilibrium position? | No effect on equilibrium position. Both Forward and reverse reaction rate increased equally |
| How would a temperature increase affect a reversible reaction where the forward reaction is exothermic? | A shift in equilibrium towards the reactants LHS as it reduces the temperature |
| What is the expression of Kc for this reaction? A + 2B ⇌ 2C+ D | kc =[A][B]²/[C]²[D] |
| What are the units for Kc for this reaction? A + 2B ⇌ 2C+ D | no units |
| What are the units for Kc for this reaction? A + 2B ⇌ 2C | mol dm⁻³ |
| Kc for a reaction is 0.01 mol dm⁻³. To what side does the equilibrium lie for this reaction? | Towards the LHS more reactants than products in the equilibrium mixture |
| Kc for a reaction is 3.23 mol dm⁻³. To what side does the equilibrium lie for this reaction? | Towards the RHS more products than reactants in the equilibrium mixture |
Created by:
JBearfield
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