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प्रश्न
What are the causes of temporary hardness and permanent hardness of water?
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उत्तर
- Temporary hardness is due to the presence of carbonate and bicarbonate salts of calcium and magnesium.
- Permanent hardness is due to the presence of chloride and sulphate salts of calcium and magnesium.
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संबंधित प्रश्न
What causes the temporary and permanent hardness of water?
What are the causes for
Permanent hardness
Name the substance which makes water temporarily hard
Name the substance which makes water permanently hard.
How will you distinguish between temporary hard water and permanent hard water?
Select the correct answer from the choice given in the options.
A substance which causes hardness in water _____.
Soap lathers well in hard water.
Why does hard water not form lather with soap?
What is soft water?
Take samples of water from different sources (like a tube well, a lake, a pond, or a river) and pour equal quantities of each sample of water into different test tubes. Measure the height of water in each test tube with a scale. Add one or two drops of liquid soap to each test tube. Shake each test tube five times and observe the height of the lather in each sample. Record your observations in the table. Which water is soft? Which water is hard? Can you say why?
