Short speech on turmeric as an natural indicator activity
Answers
Answer:
We know about Acids and Bases . But how do we determine whether a substance is acidic or basic? We have Natural Indicators around us. You probably have a natural indicator in your home right now. Let us find out more about the natural indicators around us.
Science > Acids, Bases and Salts > Natural Indicators Around Us
Acids, Bases and Salts
Natural Indicators Around Us
We know about Acids and Bases . But how do we determine whether a substance is acidic or basic? We have Natural Indicators around us. You probably have a natural indicator in your home right now. Let us find out more about the natural indicators around us.
Introduction to Acids Bases and Salts
General Properties of Acids and Bases
Acids and Bases with Different Reagents - II
Solve
Questions
An aqueous solution turns red litmus blue. Excess addition of which of the following solution would reverse the change?
1 Verified answer
Take equal quantities of dilute hydrochloric acid, sodium hydroxide solution and distilled water in three test tubes. Use red litmus paper and blue litmus paper to find out the nature of the solutions. Also, add two or three drops of phenolphthalein solution to the three test tubes. Record the observation and find out the nature of the substances.
Do you notice any colour change in distilled water? What property of water is revealed here?
1 Verified answer
The colour of pH paper strip at the pH valued of 1, 71,7 and 1414 will be :
1 Verified answer
What are Natural Indicators?
Natural Indicator is a type of indicator that can be found naturally and can determine whether the substance is an acidic substance or a basic substance. Some examples of natural indicators are red cabbage, turmeric, grape juice, turnip skin, curry powder, cherries, beetroots, onion, tomato, etc.
Some flowers like hydrangeas can determine the acidity or basicity of the soil. These flowers become blue if the soil is acidic, purple if the soil is neutral and pink if the soil is basic. The intensity of the color depends on the amount of acid or base present in the soil. Soil which is highly acidic bears deep blue flowers, whereas soil which is highly basic yields deep pink flowers.
These natural indicators are used to detect the hydrogen ions (H+) and hydroxyl ions (OH-) in a solution. Olfactory indicators can change their odor. Some examples of olfactory indicators are onion, vanilla extract, clove oil, etc.