If universal indicator is added to a solution it changes to a colour that shows the pH of the solution. Universal indicator is a mixture of a variety of other indicators and can be used to measure ...

1. Dissolve 6.5g KOH (potassium hydroxide) in 1600mL water and add several drops of universal indicator. Place in 2000mL graduated cylinder.

Save guides, add subjects and pick up where you left off with your BBC account. Pure water is neutral. However, water comes from different sources, like tap water or river water. These water ...