Equilibria AQA 0.0 / 5 ? ChemistryEquilibriaA2/A-levelAQA Created by: Victoria FryCreated on: 28-03-14 13:14 What would a generalised equation for equilibiria look like? mA + nB --> pC + qD 1 of 17 What would this equation look like in respect to kc/equilibria constant? kc= [C]p [D]q / [A]m [B]n 2 of 17 How do you calculate the moles of reactant at equilibrium? Initial moles - moles reacted 3 of 17 How do you calculate the moles of product at equilibrium? Initial moles + moles formed 4 of 17 Does temperature have an effect on 'kc'? Yes 5 of 17 Does concentration have an effect on 'kc'? No 6 of 17 Does pressure have an effect on 'kc'? No 7 of 17 Does having a catalyst effect 'kc'? No 8 of 17 If you have a larger kc, will you have a greater amount of reactants or products? Products 9 of 17 If kc is small, will equilibrium favour the reactants or products? Reactants 10 of 17 Does temperature have an effect on equilibrium? Yes 11 of 17 If temperature increases, which direction will equilbirum shift? In the endothermic direction 12 of 17 If equilbrium shifts to the reactants, what will happen to kc and why? kc will decrease as there are fewer products 13 of 17 Does pressure have an effect on equilibrium? Yes 14 of 17 If pressure increase, which direction will the reaction shift? It will shift to oppose the change and move to side with fewer moles. Whilst kc stays the same. 15 of 17 Does having a catalyst effect equilibrium? No. It doesn't have an effect. 16 of 17 Why does having a catalyst not effect the equilibrium nor the value of kc? As a catalyst speeds up both forward and backward reaction rates equally. 17 of 17
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