Question

From which substances natural indicators are prepared? Explain any one in details with procedure.

[science I] ​

Answer 1

Answer:

Indicator is a substance which is used to identify between an acids and bases.

Ex:- China rose, turmeric.

Procedure :- We need to put a drop of turmeric ( indicator ) on the given substance. If it turns the substance into red it is an acids. And if it turns blue it is base. We can also use Litmus paper. But the color may vary in different indicators

Explanation:

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Answer 2

Explanation:

Natural indicators::::

♥ natural indicator is a natural substance that can be used to determine the pH of another substance

♥ Examples :: turmeric, grape juice, turnip skin, curry powder, cherries, beetroots, onion, tomato, etc.....

Preparation::::

♥ Select a suitable coloured plant material, such as purple cabbage.Extract the colour from the plant material by either:

♥ Boiling it in water.

♥ Crushing it with water or alcohol using a mortar and pestle.

Decant the solution from the solid.

♥♥ To test a natural indicator:

To test a natural indicator:Dip the ends of two strips of filter paper into the indicator and allow to dry.

Using an eyedropper, apply a drop of strong acid to one strip and a drop of strong base to the other strip.

♥ Record any changes in colour.

♥ Add additional drops of acid and base to the strips until no further changes in colour are observed.

Thank you....❣️