Advertisements
Advertisements
Question
What do you understand by permanent hardness?
Advertisements
Solution
Permanent hardness refers to the mineral content in the water that is not possible to remove through boiling. The hardness is typically caused by the presence in water of magnesium sulfates and/or calcium sulfate that do not undergo precipitation at increased temperatures.
Therefore, permanent hardness is the sum of magnesium hardness and calcium hardness.
APPEARS IN
RELATED QUESTIONS
State the importance of water cycle in nature.
The solubility of a gas in water.............. with rise in temperature and.......................with rise in pressure.
Answer the following question:
Why is acid added to water before electrolysis ?
Give balanced chemical equations to show the reaction between Coke and steam.
Give balanced chemical equations to show the reaction between Magnesium and water.
Explain rain water harvesting.
What are stalgmites and stalactites? How are they formed?
Explain the following observation:
Washing-soda become coated with a white powder when left exposed to the atmosphere.
True or false? Correct the wrong statement.
We get rainwater throughout the year.
Water levels in rivers increase greatly during ______.
