Revise AS chemistry with these online exam masterclasses. 10 classes include topic checklists, revision materials, videos, practice questions and an hour long class focused on exam technique and challenging applications.

## Atomic structure and the periodic table

Atomic structure, mass spectra, ionisation energy and periodic trends

### Lessons

Topic checklist Revision notes Video: electronegativity and ionisation energy Practice questions and answers Video: long answer question walkthrough Exam masterclass recording## Calculations 1: Gas Volumes

Calculations involving moles, mass, empirical formula and particularly the ideal gas equation

### Lessons

Topic checklist Notes on calculations and gas volumes VIdeo: using the ideal gas equation Practice questions and answers Exam masterclass recording## Calculations 2: Titrations and solution calculations

Calculations involving solutions and titrations, including some more challenging examples with walkthroughs.

### Lessons

Topic checklist Practice questions and answers Video: back titrations More challenging titration questions Exam masterclass recording## Bonding, structure and intermolecular forces

## Energetics 1

Calculating enthalpy changes from experiment, bond energy calculations, enthalpy change definitions and Hess cycles.

### Lessons

Topic Checklist Video: enthalpy change experiments Video: enthalpy change definitions Practice questions and answers Exam masterclass recording## Acids, Bases and Chemical Equations

Common reactions of acids and bases, how to distinguish from redox reactions and constructing and balancing common chemical equations and ionic equations.

### Lessons

Topic checklist Video: types of reaction Video: ionic equations Video: redox and half-equations Practice questions and answers Exam masterclass recording## Redox 1

The first redox topic at A Level – covering balancing half equations, definitions of redox and some group chemistry

### Lessons

Topic Checklist Long answer walkthrough: reactions of halogens Video: redox half equations Video: testing for anions Practice questions and answers Exam masterclass recording## Organic Mechanisms 1

The mechanisms covered in the first year of A Level – free radical substitution, electrophilico addition and nucleophilic substitution

### Lessons

Topic checklist Practice questions and answers Videos: reaction mechanisms Video: elimination reactions Video: oxidation of alcohols Exam masterclass recording## Organic analysis 1

## Kinetics and Equilibria 1

The kinetics and equilibria covered in the AS syllabus – collision theory, Maxwell Boltzman graphs, Le Chatelier’s Principle and simple Kc calculations.