Citric acid and sodium bicarbonate are dissolved in water to give two commonly used solutions in the food industry.
The pH of these solutions is measured and their reaction observed when mixed together.
The level of acid in a range of drinks is then measured. An extension activity is included
Chromatography
July 17, 2018
Students produce a chromatogram using the colour extracted from jelly babies in the practical experiment C2. This shows that food colours are often mixtures containing