Onion Natural PH Indicator
by Shreedhar Jadhav01 in Workshop > Science
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Onion Natural PH Indicator
We can easily make a pH natural indicator from red onion. I have also tested it with different acids and bases and uploaded a video at the end.
Supplies
1x Red Onion
Boiling water
Acids and Bases for testing
(Acids- Citric acid, Lemon, Vinegar etc.)
(Bases- Window cleaner, Baking soda, Detergent etc.)
Chop an Onion Into Small Slices
Boil Some Water, and Add It to a Container
Put the Sliced Onion in the Water and Let the Water Cool Down
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After Cooling Down, the Water Gets Coloured
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The PH Indicator Is Ready! Strain and Use It
The solution turns red when added to an acid, and turns green when added to a base. Darker the colour, the more is it acidic or basic
Testing With Acids and Bases
Acids and Bases I Used
Bases- 1,2,3
Acids- 4,5,6
1- Window Cleaner, Color changes to Green- pH 11
2- Baking soda, Color changes to Light Green- pH 8
3- Detergent, Color changes to Yellowish-Green-pH 10
4- Citric Acid, Color changes to Red-pH 2
5- Vinegar, Color changes faintly to Red-pH 3 (Depends on the type of vinegar)
6- Lemon, Color changes to Light Red-pH 2