Secondary Catalogue

This programme is about seawater. It is the most important liquid on Earth, not only from its sheer volume, but also because it has remarkable qualities. A few of them, like buoyancy, are common to all liquids - but seawater is also the cradle of life. Three key factors of water underpin life in the sea: water’s dissolving power, its tendency to keep a stable temperature, and its transparency to light. This programme explains the mechanisms and the outcomes of these key facts—and other things—that make seawater both weird and wonderful. Show Less

The chemical reactivity of metals increases from the top to the bottom in a group, while the chemical reactivity of non-metals decreases as we move down in the group. On moving down in a group of the Periodic Table, there is no change in the nature of the oxides of the elements. Show Less

Moderately reactive metals are extracted from their metal oxides by the process called reduction. The reduction of metal oxides, by heating with carbon, in the form of coke, is called smelting, and the reduction of metal oxides to metal, using aluminium, is called an aluminothermite reaction. Show Less

On moving down in a group of the periodic table, the metallic character of the elements increases while their non-metallic character decreases. Metals have a tendency to lose electrons to form positive ions and are hence known as electropositive elements, while non-metals have tendency to gain electrons to form negative ions and hence are known as electronegative elements. Show Less

How is chemical equilibrium important for making ammonia? This video demonstrates how an understanding of chemical equilibrium and Le Chatelier’s principle is applied in the Haber-Bosch Process, making the production of ammonia more efficient. Clear explanations of the theory behind the process make this essential viewing for senior secondary chemistry students. Show Less

What happens when you add more product to an equilibrium? This video demonstrates how an increase in products affects reaction rates in accordance with Le Chatelier’s principle. Students will observe how the appearance of a solution of sodium chloride changes when products are added. Footage of a real lab demonstration makes this essential viewing for senior secondary chemistry students. Show Less

What is an equilibrium constant and how do we work it out? This video explains various aspects of the equilibrium constant, including what it is, how to calculate it and how it can be affected by other factors like temperature and pressure. Easy-to-understand explanations and worked-through examples of Kc calculations make this essential viewing for senior secondary chemistry students. Show Less

How is chemical equilibrium important for cellular respiration? This video explains how two competing equilibrium reactions involving haemoglobin are at work in the process of cellular respiration. Clear explanations of this life-or-death example of competing equilibria make this essential viewing for senior secondary chemistry students. Show Less

What happens when you increase the pressure on an equilibrium? This video demonstrates how changing pressure affects reaction rates in accordance with Le Chatelier’s principle. Students will observe the colour of a gaseous mixture of nitrogen dioxide and dinitrogen tetroxide under different pressure conditions. Footage of a real lab demonstration makes this essential viewing for senior secondary chemistry students. Show Less

What happens when you turn up the heat in an equilibrium? This video demonstrates how changing temperature affects reaction rates in accordance with Le Chatelier’s principle. Students will observe the colour of a solution of cobaltous chloride at different temperatures. Footage of a real lab demonstration makes this essential viewing for senior secondary chemistry students. Show Less

What happens when you remove products from an equilibrium? This video demonstrates how a decrease in the amount of product affects reaction rates in accordance with Le Chatelier’s principle. Students will observe how the appearance of a solution of zinc hydroxide changes when hydrochloric acid are added. Footage of a real lab demonstration makes this essential viewing for senior secondary chemistry students. Show Less

What does Le Chatelier have to do with chemical equilibrium? This shows how various changes can affect the balance of a reaction in equilibrium and favour one reaction over another, as predicted by Le Chatelier’s principle. Easy-to-understand explanations and clear examples make this essential viewing for senior secondary chemistry students. Show Less

What happens when you add more reactant to an equilibrium? This video demonstrates how an increase in reactants affects reaction rates in accordance with Le Chatelier’s principle. Students will observe how the colour of a solution of ferric thiocyanate changes when reactants are added. Footage of a real lab demonstration makes this essential viewing for senior secondary chemistry students. Show Less

What does it mean if a reaction is in equilibrium? This video introduces key concepts such as reversible and irreversible reactions, forward and reverse reactions and equilibrium. Easy-to-understand explanations and examples of chemical equilibria in daily life make this essential viewing for senior secondary chemistry students. Show Less

The start of The Periodic Games is just a day away. As attraction sparks between Chlorine and Sodium, President H2O fears that their new bond could incite revolution. Meanwhile, the other tributes are in training, forming covalent bonds that could help them survive in the Laboratoria, where only one atom will be left standing by the end. Show Less

When Chlorine Everclean voluntarily takes her sister’s place in The 75th Periodic Games, hosts Titanium Alloy and Caesium Lepton are taken by surprise! Chlorine isn’t as strong a contender as her little sister Fluorine, and the other 17 tributes are fierce competition. In this first episode, we meet the tributes offered by every group of the periodic table as they prepare to do battle in the Laboratoria. Show Less

Nanotechnology has found its way into our homes and everyday lives. This clip reveals some amazing applications that are part of our everyday lives now, and takes a look nanotechnology in the future and the revolutionary impact it will continue to have. It opens a world of possibilities for students of middle to senior level science, chemistry and physics. Show Less

Nanotechnology has diverse applications and phenomenal potential. This clip examines the properties of nanoparticles and the amazing range of applications – now and into the future. It also looks at some of the risks of this emerging field of science and technology. Students of middle to senior level science, chemistry and physics will find this an invaluable learning resource. Show Less

Nanoparticles are tiny bits of material with a diameter between one and 100 nanometres. This clip explores the tiny world of nanoparticles and how their size and structure make them so useful, including the square-cube law and the relationship between volume and surface area. It provides students of middle to senior level science, chemistry and physics with insights to phenomena at the smallest imaginable scale. Show Less

Objective: To learn about the types and properties of pure substances, various types of solutions. Learning outcomes - students will be able to: 1. Define pure substances 2. Classify pure substances as elements and compounds 3. List elements as metals, non-metals and metalloids 4. Synthesise iron II sulphide by heating iron and sulphur 5. Discuss solid and liquid solutions 6. List examples of solid and liquid solutions 7. Explain saturated and unsaturated solutions 8. Define mixtures with examples 9. Describe homogenous mixtures 10. Describe heterogeneous mixtures 11. Categorise the different types of mixtures on the basis of the physical state of their components Show Less