AQA A Level Chemistry复习笔记3.1.2 Types of Formulae
Types of Formulae The general formula is a formula that represents a homologous series of compounds using letters and numbers Eg. the general formula of alkanes is CnH2n+2 A homologous serie...
AQA A Level Chemistry复习笔记2.3.4 Uses & Reactions of Chlorine
Reactions of Halide Ions A disproportionation reaction is a reaction in which the same species is both oxidised and reduced The reaction of chlorine with dilute alkali is an example of a dis...
AQA A Level Chemistry复习笔记2.3.3 Testing for Halide Ions
Testing for Halides Silver ions & ammonia Halide ions can be identified in an unknown solution by dissolving the solution in nitric acid and then adding silver nitrate solution dropwise ...
AQA A Level Chemistry复习笔记2.3.2 Chemical Properties of Group 7
Halogens: Oxidising Agents Halogens react with metals by accepting an electron from the metal atom to become an ion with 1- charge Eg. Ca (s) + Cl2 (g) → CaCl2 (s) consisting of Ca2+ and ...
AQA A Level Chemistry复习笔记2.2.4 Uses of Group 2 Elements
Uses of Group 2 Three different calcium compounds are used commonly in agriculture, construction and iron extraction: Limestone - this is impure calcium carbonate Quicklime - this is calcium...
AQA A Level Chemistry复习笔记2.2.3 Reactions of Group 2
Reactions of Group 2 The group 2 elements react with oxygen, water and dilute acids Group 2 Reactions - Observations Reactions with water and oxygen The reaction of group 2 metals wit...
AQA A Level Chemistry复习笔记2.2.2 Solubility of Group 2 Compounds: Hydroxides & Sulfates
Solubility of 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 ...
AQA A Level Chemistry复习笔记2.1.4 Trends of Period 3 Elements: Melting Point
Trend: Melting Point Melting points of the elements across period 3 A pattern is a little harder to see from the data, but you can see that it rises and falls: Melting points of the period 3...
AQA A Level Chemistry复习笔记2.1.3 Trends of Period 3 Elements: First Ionisation Energy
Trend: First Ionisation Energy The first ionisation energy (IE1) is the energy required to remove one mole of electrons from one mole of atoms of an element in the gaseous state to form one ...
