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Equilibria

AQA A Level Chemistry

QuestionAnswer
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