Edexcel A Level Chemistry:复习笔记2.1.4 Ionic Equations
Writing Chemical Formulae Oxidation numbers are a useful tool for naming compounds as some elements can exist with more than one oxidation number For compound with two elements it is straigh...
Edexcel A Level Chemistry:复习笔记2.1.3 Redox & Disproportionation
Disproportionation Disproportionation reactions A disproportionation reaction is a reaction in which the same species is simultaneously oxidised and reduced Example of a disproportion reacti...
Edexcel A Level Chemistry:复习笔记2.1.2 Types of Reduction & Oxidation
Electron Transfer & Change in Oxidation Number Oxidation and reduction in a reaction can be demonstrated in terms of electron transfer For example: 2NH3 + 3Br2 → N2 + 6HBr The oxidation ...
Edexcel A Level Chemistry:复习笔记2.1.1 Oxidation Number
Defining Oxidation Number There are three definitions of oxidation and reduction used in different branches of chemistry Oxidation and reduction can be used to describe any of the following...
Edexcel A Level Chemistry:复习笔记1.10.4 Deducing Kc Expressions
Deducing Kc Expressions Equilibrium expression & constant The equilibrium expression links the equilibrium constant, Kc, to the concentrations of reactants and products at equilibrium ta...
Edexcel A Level Chemistry:复习笔记1.10.3 The Rate & Yield Compromise
Industrial Compromises The Haber Process is, once again, a good example of the need for a compromise of reaction conditions in industrial processes N2 (g) + 3H2 (g) ⇌ 2NH3 (g) The reaction i...
Edexcel A Level Chemistry:复习笔记1.10.2 Le Chatelier's Principle
Le Chatelier's Principle Position of the equilibrium The position of the equilibrium refers to the relative amounts of products and reactants in an equilibrium mixture When the position of e...
Edexcel A Level Chemistry:复习笔记1.10.1 Dynamic Equilibrium
Dynamic Equilibrium Reversible reaction Some reactions go to completion where the reactants are used up to form the products The reaction stops when all of the reactants are used up In rever...
Edexcel A Level Chemistry:复习笔记1.9.4 Catalysts in Industry
Catalysts in Industry Catalysts can be divided into two types: Homogeneous catalysts Heterogeneous catalysts Homogeneous means that the catalyst is in the same phase as the reactants ...
