When pure water is dropped into a solution of universal indicator, the indicator stays green. This indicates a pH value of 7 and tells us that water is neither alkaline or acid, but neutral.

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

Make the indicator solution for student groups: Prepare a dilute universal indicator solution by combining 325 mL of water with 25 mL of universal indicator solution. This quantity should be enough ...