Litmus paper

 Litmus is a tree lichen fungi and is made into small paper strips or a liquid for acids or alkalines.

Blue litmus paper determines if something is acids. It turns red in solutions with a pH less than 7.

1. Red Litmus paper determines if something is alkaline. It turns blue in solutions with a pH greater than 7.

materials

1. Red Litmus paper

2. Blue Litmus paper

3. Sodium Hydroxide

4. Hydrochloric acid

5. Pipette

6. 4 Test tubes

Steps

1. Rip the litmus paper in half and put half in each test tube.

2. Add 3 drops of hydrochloric acid to the blue litmus paper in test tube 1.

3. Add 3 drops of hydrochloric acid to the red litmus paper in test tube 2.

4. Add 3 drop of Sodium Hydroxide to the blue litmus paper in test tube 3.

5. Add 3 drops of Sodium Hydroxide to the blue litmus paper in test tube 4.