Experimental programme & IA
Voltaic cells
This practical gives hands-on experience of constructing voltaic cells and identifying the direction of electron flow in the external circuit and the need for a salt bridge to allow ions to flow between...
.png)
Experimental programme & IA
Redox reactions of vanadium
Although the colours of individual transition metal ions in solution do not need to be learned, they do provide an excellent way to distinguish easily between the different oxidation states of ions of...
Experimental programme & IA
Analysis of Cu(II) ions in solution
In this experiment students make up a standard solution of Cu2+(aq) ions, successively dilute it and use a spectrophotometer or a colorimeter to make a calibration curve. They then measure the absorbance...
Experimental programme & IA
Percentage of copper in brass
Determining the percentage of copper in brass using redox reactions and a titration. Brass objects have been found dating back as far as 5000 BCE. Brass has many different uses, for example, musical instruments,...
Experimental programme & IA
Determination of vitamin C content
Vitamin C is necessary part of the diet as it is required to form the protein, collagen. A lack of vitamin C can cause lesions in the skin – a condition known as scurvy. It has the formula C6H8O6 and...
Experimental programme & IA
Redox titration with KMnO4
This is a particularly good experiment to introduce the practical technique of redox titration and also provides much scope for good evaluation. Students may already have met a simple form of redox titration...
Experimental programme & IA
Chlorine content of swimming pool water
This practical uses the redox reaction between chlorine and iodide ions to releases iodine which is then reacted with thiosulfate ions. It is a simple experiment to carry out as the volumes are determined...
Experimental programme & IA
CaCO3 in egg shells
This practical uses the technique of 'back titration' to determine the percentage of calcium carbonate present in the shells of eggs. It covers both applying techniques to acid-base and redox titration...
Experimental programme & IA
A green acid-base practical problem
This practical presents a challenge to your students as it mimics real life in that the planet only has finite resources and once they are used up they are cannot be replaced. Your students need to realise...
Experimental programme & IA
Analysis of aspirin tablets
A nice application of a relevant acid-base titration which can also be used to explain why there is a considerable variation in the price different manufacturers of aspirin-containing tablets charge per...