Litmus paper

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

1. Blue Litmus paper determines if something is acidic. It turns red in solutions with pH less than 7.

2. Red Litmus paper determines if something is alkaline. It turns blue in solutions with pH less than.

Materials 

1. Red Litmus paper

2. Blue Litmus paper

3. Sodium Hydroxide

4. Hydrochloride 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 hydrochloride acid to the blue litmus paper in test tube 1.

3. Add 3 drops of hydrochloride 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.