Edexcel A Level Chemistry:复习笔记2.2.5 Flame Tests
Flame Tests Metal ions produce a colour if heated strongly in a flame Ions from different metals produce different colours The flame test is thus used to identify metal ions by the colour of...
Edexcel A Level Chemistry:复习笔记2.2.4 Group 2 Carbonates & Nitrates
Group 2 Carbonates & Nitrates Thermal decomposition is the breakdown of a compound into two or more different substances using heat Thermal decomposition of carbonates The Group 2 carbon...
Edexcel A Level Chemistry:复习笔记2.2.3 Group 2 Hydroxides & Sulfates
Group 2 Hydroxides & Sulfates Group 2 hydroxides Going down the group, the solutions formed from the reaction of Group 2 oxides with water become more alkaline When the oxides are dissol...
Edexcel A Level Chemistry:复习笔记2.2.2 Reactions of Group 2
Group 2 Elements Reactions with water and oxygen The reaction of group 2 metals with oxygen follows the following general equation: 2M (s) + O2 (g) → 2MO (s) Where M is any metal in group 2 ...
Edexcel A Level Chemistry:复习笔记2.2.1 Explaining Group 2 Trends
Ionisation Energy Chemical trends All elements in Group 2 (also called alkali earth metals) have two electrons in their outermost principal quantum shell All Group 2 metals can form ionic co...
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...
