Rates, Equilibrium and pH chemistry OCR 4.0 / 5 based on 12 ratings ? ChemistryEquilibriaA2/A-levelAll boards Created by: rosemary colemanCreated on: 09-05-10 19:35 What is dissociation? When an acid releases H+ ions in aqueous solution 1 of 8 How does the rate determining step effect the rate of the reaction the rate is only as fast as the rate determining step 2 of 8 when Kc > 1 does the reaction favours the products or the reactants? products 3 of 8 What is an example of a tribasic acid? H3PO4 4 of 8 For strong acids, why does [H+] = [HA] ? because the acid dissociates completely 5 of 8 What is a buffer? a mixture that minimises the changes in pH on addition of small amounts of acid and alkali 6 of 8 What is the end point? point at which the concentrations of the weak acid and the conjugate base of an indicator are equal 7 of 8 what is the equation for Kc (where A and B are reactants, and C and D are products) Kc = ( [C]^c x [D]^d ) / ( [A]^a x [B]^b ) 8 of 8
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