Litmus paper - science

 Hi guys today in science we are looking at Litmus Paper.

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

1. Blue litmus paper determines if something is acidic. It turns read in solutions with a pH less than 7
2. Red litmus paper determines if something is alkaline. It turns blue in solutions with a pH greater than 7.


Litmus experiment:

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 red litmus paper in test tube 1.
3. Add 3 drips of hydrochloric acid to the blue litmus paper in test tube 2.
4. Add 3 drops of sodium hydroxide to the blue litmus paper in test tube 3.
5. Add 3 drops of sodium hydroxide to the red litmus paper in test tube 4.

Findings:
The blue litmus paper with hydrochloric acid went red.
The blue litmus paper with sodium hydroxide didn't change.
The red litmus paper with Hydrochloric acid didn't change. (made the liquid yellow)
The red litmus paper with sodium hydroxide went blue.

 Conclusion:
In conclusion blue litmus is a acidic, red litmus is alkaline.