IB DP Chemistry: HL复习笔记18.1.5 Salt Hydrolysis
Salt Hydrolysis An ionic salt is formed from the neutralisation reaction of an acid and base Neutralisation The ionic salt, MA, formed will dissociate in water Hydrolysis is where water is used to...
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IB DP Chemistry: HL复习笔记18.1.4 Buffers
Buffers A buffer solution is a solution which resists changes in pH when small amounts of acid or base are added A buffer solution is used to keep the pH almost constant A buffer can consist of wea...
IB DP Chemistry: HL复习笔记18.1.3 Indicators
Indicators An acid-base indicator is a weak acid which dissociates to give an anion of a different colour Consider a weak acid, HIn: HIn (aq) + H2O (l) ⇌ H3O+ (aq) + In– (aq) colour 1 ...
IB DP Chemistry: HL复习笔记18.1.2 pH Curves
pH Curves During a titration, a pH meter can be used and a pH curve plotted A pH curve is a graph showing how the pH of a solution changes as the acid (or base) is added The features of a pH curve ...
IB DP Chemistry: HL复习笔记18.1.1 Lewis Theory
Lewis Theory of Acids & Bases A more general definition of acids and bases was given by G.N. Lewis who defined them as: A Lewis acid is an electron pair acceptor A Lewis base is an electron pai...
IB DP Chemistry: HL复习笔记17.1.2 Gibbs Free Energy & the Equilibrium Constant
Gibbs Free Energy & the Equilibrium Constant Gibbs Free Energy & the Equilibrium Constant The equilibrium constant, Kc, gives no information about the individual rates of reaction It is ind...
IB DP Chemistry: HL复习笔记17.1.1 Applying the Equilibrium Law
Explaining Le Châtelier’s Principle Le Châtelier's principle Le Châtelier's principle says that if a change is made to a system at dynamic equilibrium, the position of the equilibrium moves to mini...
IB DP Chemistry: HL复习笔记16.2.3 Activation Energy from Rate Constants
Activation Energy from Rate Constants at Different Temperatures Arrhenius Plots Arrhenius plots for two reactions with different activation energies can be drawn on the same graph Arrhenius plots f...
IB DP Chemistry: HL复习笔记16.2.2 Graphing the Arrhenius Equation
Graphing the Arrhenius Equation Finding the Activation Energy Very often, the Arrhenius equation is used to calculate the activation energy of a reaction A question will either give sufficient info...
