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प्रश्न
State what are synthetic detergents. Explain experimentally how you will determine the advantage of synthetic detergents over soap using a sample of hard water.
उत्तर
Divide the sample of hard water into two parts.
To the first part of hard water add synthetic detergent and rub slowly with hand, it will lather easily.
Now add to the second part of hard water an ordinary piece of soap and rub with hand, it will not lather but scum is formed and soap is wasted.
Hence in case of hard water, it is advantageous to use synthetic detergent.
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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
Permanent hard water
What are the causes for:
Temporary hardness
What are the causes for
Permanent hardness
Name the substance which makes water temporarily hard
Explain with equation, what is noticed when permanent hard water is treated with
Slaked time
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?
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you remove temporary hardness and permanent hardness from water using a chemical compound?
Select the correct answer from the choice given in the options.
A substance which causes hardness in water _____.
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.
Why does hard water not form lather with soap?
The pleasant taste of drinking water is due to the presence of a dissolved substance which includes air, CO2, and minerals.
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. Hardness of the solution is ______.
