Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 30 - Dynamic Equilibria. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 3.19C - Know that a reversible reaction can reach dynamic equilibrium in a sealed container. Specification Point 3.20C - Know that at dynamic equilibrium the forward and reverse reactions occur at the same rate and the concentrations of reactants and products remain constant. Specification Point 3.21C - Understand why a catalyst does not affect the position of equilibrium in a reversible reaction. Specification Point 3.22C - Know the effect of changing either temperature or pressure on the position of equilibrium in a reversible reaction. Complete set of Chapter 6 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.19C - Know that a reversible reaction can reach dynamic equilibrium in a sealed container. Specification Point 3.20C - Know that at dynamic equilibrium the forward and reverse reactions occur at the same rate and the concentrations of reactants and products remain constant. Specification Point 3.21C - Understand why a catalyst does not affect the position of equilibrium in a reversible reaction. Specification Point 3.22C - Know the effect of changing either temperature or pressure on the position of equilibrium in a reversible reaction. Complete set of Chapter 6 Lessons are available.

Complete set of companion PDF worksheets for Edexcel IGCSE Chemistry (4CH1) Chapter 6 - Physical Chemistry. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Five worksheets included: 26 - Energetics 27 - Bond Energies 28 - Rates of Reaction 29 - Reversible Reactions 30 - Dynamic Equilibria

Complete set of companion PDF worksheets for Edexcel IGCSE Chemistry (4CH1) Chapter 7 - Organic Chemistry. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Eight worksheets included: 31 - Organic Compounds 32 - Crude Oil 33 - Burning Hydrocarbons 34 - Alkanes and Alkenes 35 - Organic Compounds Part 2 36 - Esters 37 - Addition Polymers 38 - Condensation Polymers

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 35 - Organic Compounds Part 2. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.29C - Know that alcohols contain the functional group −OH. Specification Point 4.30C - Understand how to draw structural and displayed formulae for methanol, ethanol, propanol and butanol and name each compound. Specification Point 4.31C - Know that how ethanol can be oxidised. Specification Point 4.32C - Know how ethanol can be manufactured. Specification Point 4.33C - Understand the reasons for fermentation, in the absence of air, and at an optimum temperature. Specification Point 4.34C - Know that carboxylic acids contain the functional group -COOH. Specification Point 4.35C - Understand how to draw structural and displayed formulae for unbranched-chain carboxylic acids with up to four carbon atoms in the molecule, and name each compound. Specification Point 4.36C - Describe the reactions of aqueous solutions of carboxylic acids with metals and metal carbonates. Specification Point 4.37C - Know that vinegar is an aqueous solution containing ethanoic acid. Complete set of Chapter 7 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 4.38C - Know that esters contain the functional group -COO-. Specification Point 4.39C - Know that ethyl ethanoate is the ester produced when ethanol and ethanoic acid react in the presence of an acid catalyst. Specification Point 4.40C - Understand how to write the structural and displayed formulae of ethyl ethanoate. Specification Point 4.41C - Understand how to write the structural and displayed formulae of an ester, given the name or formula of the alcohol and carboxylic acid from which it is formed and vice versa. Specification Point 4.42C - Know that esters are volatile compounds with distinctive smells and are used as food flavourings and in perfumes. Specification Point 4.43C - Practical: prepare a sample of an ester such as ethyl ethanoate. Complete set of Chapter 7 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 36 - Esters. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.38C - Know that esters contain the functional group -COO-. Specification Point 4.39C - Know that ethyl ethanoate is the ester produced when ethanol and ethanoic acid react in the presence of an acid catalyst. Specification Point 4.40C - Understand how to write the structural and displayed formulae of ethyl ethanoate. Specification Point 4.41C - Understand how to write the structural and displayed formulae of an ester, given the name or formula of the alcohol and carboxylic acid from which it is formed and vice versa. Specification Point 4.42C - Know that esters are volatile compounds with distinctive smells and are used as food flavourings and in perfumes. Specification Point 4.43C - Practical: prepare a sample of an ester such as ethyl ethanoate.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 8.3 - Understand how geopolitical relationships between countries are important in managing trade, migration and tourism. Complete set of Chapter 9 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.3 - Understand case studies of river management in a developed country and a developing or emerging country. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.3.1 - Surface area to volume ratio. Complete set of Chapter 3 Lectures are available.

Complete set of concise, modern presentations for AQA A Level Psychology (7181 and 7182) Chapter 10 - Gender. Contains colour coded specification points. Five presentations included: 53 - Sex and Gender 54 - Biology and Gender 55 - Cognitive Explanations of Gender 56 - Pyschodynamic Explanations of Gender 57 - Social Explanations of Gender

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.8.2.1 - Most of a cell’s DNA is not translated. Complete set of Chapter 8 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.7.1 - Inheritance. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.8 - Understand how to classify a substance as an element, compound or mixture. Specification Point 1.9 - Understand that a pure substance has a fixed melting and boiling point, but that a mixture may melt or boil over a range of temperatures. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.33C - Describe how to carry out an acid-alkali titration. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.15 - Understand the processes of diffusion, osmosis and active transport by which substances move into and out of cells. Specification Point 2.16 - Understand how factors affect the rate of movement of substances into and out of cells, including the effects of surface area to volume ratio, distance, temperature and concentration gradient. Specification Point 2.17 - Practical: Investigate diffusion and osmosis using living and non-living systems. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.7 - Identify the chemical elements present in carbohydrates, proteins and lipids (fats and oils). Specification Point 2.8 - Describe the structure of carbohydrates, proteins and lipids as large molecules made up from smaller basic units; starch and glycogen from simple sugars, proteins from amino acids and lipids from fatty acids and glycerol. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.1 -Describe the level of organisation in organisms: organelles, cells, tissues, organs and organ systems. Specification Point 2.2/2.3 - Describe the structures and functions of the cell’s organelles, including the nucleus, cytoplasm, cell membrane, cell wall, mitochondria, chloroplast, ribosome and vacuole. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.5B - Explain the importance of cell differentiation in the development of specialised cells. Specification Point 2.6B - Understand the advantages and disadvantages of using stem cells in medicine. Complete set of Chapter 1 Lectures are available.