Chemistry

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Combined Science A: 22 May 2023, 1h 10m
Combined Science A: 13 June 2023, 1h 10m

Particles

The Particle Model 08:16
Atomic Structure and Isotopes 09:17
Developing the atomic model 04:37

Elements, compounds and mixtures

Relative formula mass and empirical formula 10:43
Purity and formulations 02:55
Separation techniques 06:07
Chromatography 08:27
Electronic Structure 07:01
The Periodic Table 06:16
Ionic Bonding 11:43
Covalent bonding and simple molecules 12:22
Giant covalent structures 08:28
Polymer molecules 04:17
Metallic bonding 05:23
Changing state 07:03
Bulk properties of materials 09:40
Nanoparticles 04:40

Chemical reactions

Chemical formulae 10:07
Conservation of mass and balanced equations 08:32
The mole 06:02
Mole calculations 16:36
Exothermic and endothermic reactions 04:19
Reaction profiles 06:31
Calculating Energy Changes 07:53
Redox reactions and half equations 08:24
Reactions of acids 09:37
The pH scale and neutralisation 05:25
Making salts 04:52
Hydrogen ions and pH 08:48
Electrolysis of molten salts 13:06
Electrolysis of aqueous salts 18:32
Applications of electrolysis 05:51

Predicting and identifying reactions

Group 1 – The Alkali Metals 05:30
Group 0 – The Noble Gases 02:05
Group 7 – Halogens 08:41
Group 7 – Halogens 08:59
Transition metals 03:13
Reactivity of elements 12:26
Gas tests 05:42
Tests for cations 07:58
Tests for anions 07:41
Instrumental methods of analysis 04:03

Monitoring and controlling chemical reactions

Yield and atom economy 12:32
Concentration of a solution 04:51
Concentration of a solution 08:39
Titrations 15:40
Gas calculations 08:56
Measuring rates of reaction 11:53
Measuring rates of reaction (PAG) 07:35
Interpreting rate graphs 09:04
Factors affecting rates of reaction 07:19
Collision theory and activation energy (including catalysts) 05:38
Reversible reactions and equilibrium 05:01
Equilibrium position 08:12

Global Challenges

Fertilisers 06:50
The Haber process 06:23
The Contact process 08:15
Making Ethanol 07:26
Extracting metals 04:52
Extracting Iron (The Blast furnace) 05:11
Extracting Aluminium 08:58
Biological metal extraction 06:06
Corrosion 06:42
Choosing materials 08:59
Recycling materials 10:24
Alkanes from Crude Oil 07:24
Alkanes from Crude Oil 09:09
Cracking oil fractions 05:53
Reactions of Alkanes 04:35
Alkenes 09:34
Alcohols 05:58
Carboxylic Acids 04:57
Addition Polymers 06:49
Biological Polymers 05:49
Condensation Polymers 05:42
Producing electricity using Chemistry 10:48
Forming the atmosphere 06:57
Pollution and the atmosphere 06:19
Climate Change 10:53
Water for drinking 10:37
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