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Question
How will you check with the help of soap powder whether water is hard?
Solution
- In hard water (from a well or a tube well), soap does not foam but instead creates scum.
- As a result, soap loses its cleaning ability. So, using soap, we can determine that the water is hard.
RELATED QUESTIONS
List two problems that arise due to the use of detergents instead of soaps.
Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?
What are the raw materials required for making soap in a laboratory (or at home)?
Why is common salt (sodium chloride) added during the preparation of soap?
The chemical which is not required for the preparation of soap in the laboratory is:
(a) vegetable oil
(b) baking soda
(c) caustic soda
(d) common salt
The chemical mostly used in the preparation of most of the soaps we use is
(a) Sodium chloride
(b) Potassium hydroxide
(c) Sodium hydroxide
(a) Potassium chloride
What is meant by 'surface activity'?
Write an answer to the following question.
Name three chemicals responsible for the surface activity of various detergents.
Soaps were originally made from ______.
TFM in soaps represents ______ content in soap.
