AQA A Level Chemistry复习笔记5.4.3 Predicting Reactions
Predicting Reactions Direction of electron flow The direction of electron flow can be determined by comparing the Eꝋ values of two half-cells in an electrochemical cell Cl2 (g) + 2e- ⇌ 2Cl- ...
AQA A Level Chemistry复习笔记5.4.2 Standard Electrode Potentials
Standard Electrode Potentials Standard electrode potential The position of equilibrium and therefore the electrode potential depends on factors such as: Temperature Pressure of gases Concent...
AQA A Level Chemistry复习笔记5.3.3 Changes in Temperature & Pressure
Changes in Temperature & Pressure We can apply Le Chatelier's Principle to gaseous equilibria in the same way it is applied to aqueous systems Here's a reminder of how the principle work...
AQA A Level Chemistry复习笔记5.3.2 Partial Pressure
Partial Pressure The partial pressure of a gas is the pressure it exerts in a mixture of gases if it occupied the container on its own Partial pressure is given the symbol p, so for a gas X,...
AQA A Level Chemistry复习笔记5.2.8 Rate Determining Step
Rate Determining Step Rate-determining step & intermediates A chemical reaction can only go as fast as the slowest part of the reaction So, the rate-determining step is the slowest step ...
AQA A Level Chemistry复习笔记5.2.7 Rate-Concentration Graphs
Rate-Concentration Graphs Order of reaction from initial rate The progress of the reaction can be followed by measuring the initial rates of the reaction using various initial concentrations...
AQA A Level Chemistry复习笔记5.2.6 Concentration-Time Graphs
Concentration-Time Graphs Order of reaction from concentration-time graphs In a zero-order the concentration of the reactant is inversely proportional to time This means that the concentrati...
AQA A Level Chemistry复习笔记5.2.5 Finding Activation Energy
Finding Activation Energy Finding the Activation Energy Very often, the Arrhenius Equation is used to calculate the activation energy of a reaction Either a question will give sufficient inf...
AQA A Level Chemistry复习笔记5.2.4 The Arrhenius Equation
The Arrhenius Equation The rate equation shows how each of the reactants in a reaction effects the rate of the reaction and it includes the rate constant, k However, k only remains constant ...
AQA A Level Chemistry复习笔记5.2.3 Rate Equation Calculations
Rate Equation Calculations The rate constant (k) of a reaction can be calculated using the initial rates and the rate equation Calculating the rate constant from the initial rate The reactio...
AQA A Level Chemistry复习笔记5.2.2 Deriving Rate Equations
Deducing Orders Order of reaction For the general reaction A + B → C + D The order of reaction shows how the concentration of a reactant affects the rate of reaction Rate = k [A]m [B]n When ...
2022年夏季A-Level&GCSE成绩公布时间已确认！三大考试局秋季考试具体安排公布
2022年夏季大考，CAIE、爱德思、牛津AQA成绩何时放榜？ CAIE考试局 2022年8月11日：AS&A Level成绩公布 2022年8月17日：Pre-U成绩公布 2022年8月18日：IGCSE和O Level成绩公布 爱德思考试局 2022.8.18：IAS&a...
