Advertisements
Advertisements
प्रश्न
What are the causes for:
Temporary hardness
Advertisements
उत्तर
The presence of hydrogen carbonates of calcium and magnesium makes water temporarily hard.
APPEARS IN
संबंधित प्रश्न
What causes the temporary and permanent hardness of water?
What do you understand by
Permanent hard 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?
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you remove temporary hardness from water without using a chemical compound?
Name or state the following:
A substance added to remove both temporary and permanent hardness in water.
Give a reason for the following.
Hard water is not good for washing utensils.
What are the causes of temporary hardness and permanent hardness of water?
The pleasant taste of drinking water is due to the presence of a dissolved substance which includes air, CO2, and minerals.
Which water is hard?
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 ______.
