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Question
Soap lathers well in hard water.
Options
True
False
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Solution
Soap lathers well in hard water- false.
Correct statement:
Soap lathers well in soft water.
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RELATED QUESTIONS
What causes the temporary and permanent hardness of water?
What are the causes for:
Temporary hardness
What are the causes for
Permanent hardness
Name the substance which makes water temporarily hard
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?
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.
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 ______.
