There are 8 required practical's for Chemistry:

• Making salts - Preparation of a pure, dry sample of a soluble salt from an insoluble oxide or carbonate using a Bunsen burner to heat dilute acid and a water bath or electric heater to evaporate the solution. 

• Temperature changes - Investigate the variables that affect temperature change in chemical reactions eg acid plus alkali. 

• Rates of reaction - Investigate how changes in concentration affect the rates of reactions by both measuring the volume of a gas produced and monitoring a change in colour or turbidity. 

• Chromatography - Investigate how paper chromatography can be used to separate and tell the difference between coloured substances. Students should calculate Rf values. 

• Water purification - Analysis and purification of water samples from different sources. To include pH measurement, removal of dissolved solids and distillation. 

• Electrolysis - Investigate what happens when aqueous solutions are electrolysed using inert electrodes. 

The following 2 practical's are for Separate Chemistry Only:

• Neutralisation (Chem only) - Determination of the reacting volumes of solutions of a strong acid and a strong alkali by titration. 

• Identifying ions (Chem only) - Use of chemical tests to identify the ions in unknown single ionic compounds covering the ions from Flame tests and sulphates. 

Watch the following videos and after each one summarise what you have revised by completing the following document: