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प्रश्न
Name the substance which makes water temporarily hard
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उत्तर
Hydrogen carbonates of calcium and magnesium
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संबंधित प्रश्न
Discuss the principle and method of softening of hard water by synthetic ion-exchange resins.
What do you understand by
Temporary hard water
What are the causes for:
Temporary hardness
What are the causes for
Permanent hardness
Explain with equation, what is noticed when permanent hard water is treated with
Slaked time
How will you distinguish between temporary hard water and permanent hard water?
Name or state the following:
A substance added to remove both temporary and permanent hardness in water.
What are the causes of temporary hardness and permanent hardness of 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?
1000 g aqueous solution of CaCO3 contains 10 g of calcium carbonate. Concentration of the solution is ______.
