Student Projects/Acids & Bases
ACIDS AND BASES edit
Turmeric as a natural indicator edit
Definition of an indicator edit
The substance which is used to test whether the given substance is acidic or basic in nature is called an indicator.A type of indicators which are found naturally are called natural indicators.
Examples of an indicator edit
Turmeric, China rose petals, litmus, red cabbage etc.
Acids edit
vinegar (acetic acid)
Orange, lemons (citric acid)
Curd (lactic acid)
Grapes, Tamarind (tartaric acid)
Bases edit
soap solution
Baking soda
Tooth paste
Lime water
The effect of turmeric indicator on acidic and basic solution edit
Turmeric paper (yellow colour) turns into red when it is dipped into basic solution. And it does not change its colour with acid.
| EFFECT OF TURMERIC | |||
| SLNO | TEST SOLUTION | EFFECT | REMARKS |
| 1 | SOAP SOLUTION | TURNED TO RED | BASE |
| 2 | BAKING SODA | TURNED TO RED | BASE |
| 3 | LIME WATER | TURNED TO RED | BASE |
| 4 | SUGAR SOLUTION | NO CHANGE | ACID |
| 5 | LEMON JUICE | NO CHANGE | ACID |
Effect on China Rose edit
We can use China rose petals (pink colour) as an indicator which turns acidic solutions to dark pink and basic solutions to green.