Oxygen is a key component of the atmosphere and is critical for the support of life. Its reactivity makes it essential for respiration and combus...
1.4 Activity 5 : Defining diffusion, diluting and dissolving Gases can diffuse into each other . This is because the particles in a gas are in a...
When non-metal atoms bond to other non-metal atoms they share electrons to form covalent bonds. 1.46 Activity 2. Crossing and do...
1.23 Family resemblances Hydrogen is often listed above group 1 the Alkali metals. Although like group 1 atoms, hydrogen atoms have a ...
Electrolysis is often used to give metal objects a decorative coating. This is known as electroplating.
1.55 Using electrolysis Electrolysis happens when an electric current is passed through an ionic compound which has been melted or dissolved.&nb...
Chromatography is another important separation technique. Several different types of chromatography exist.
Particle theory explains why the smell of cooking in the kitchen can quickly be smelt by people in other rooms.
1.3 Activity 4. A particular problem Students should: 1.3 understand how the results of experiments involving the dilution of coloured sol...
A question of balance
Many chemical reactions can be reversed. When this happens we can describe a forward reaction and a back reaction. Sometimes the for...
The Bast furnace enables us to extract pure iron from iron oxide
Modern methods Activity 1 : Phytomining and Bioleaching Watch the video carefully, stopping where necessary to answer the questions b...
Universal indicator is useful for giving an estimated value for the pH of a substance
Background This topic is mostly about equilibria so it is important for students to understand that concept first. Before tackling this topic ma...