Advertisements
Advertisements
Question
Give a balanced equation for the following conversion:
Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate.
Advertisements
Solution
\[\ce{\underset{\text{Sodium carbonate}}{Na2CO3} + \underset{\text{In hard water}}{CaSO4} -> \underset{\text{Cal. carbonate}}{CaCO3↓} + \underset{\text{Sodium sulphate}}{Na2SO4}}\]
APPEARS IN
RELATED QUESTIONS
What are the main causes of water pollution ? How can it be controlled ?
Give reason of Alcohol is mixed with water and is used in car radiator.
Give one word for the following statement:
A mixture of common salt and ice .
Explain why:
Fused CaCl2 or conc. H2SO4 is used in a desiccator.
Give reason for the following:
The percentage of oxygen, in air dissolved in water, is higher than the percentage of oxygen in ordinary air.
Fill in the blank:
Unpolluted water has _____ amount of dissolved oxygen.
Look at the map of Tamilnadu showing annual rainfall and answer the questions given below
- Identify the districts that get only low annual rainfall in Tamilnadu.
- Identify the districts that get a medium annual rainfall in Tamilnadu.
- State the districts that enjoy high annual rainfall in Tamilnadu.
How is the life of organisms living in water affected when water gets polluted?
State whether the following statement is True or False. If false, write the correct statement.
Ice is solid whereas snow is the semi-solid form of water
Match Column I with Column II
| Column I | Column II | ||
| (a) | Ground water | (i) | Solid form of water |
| (b) | Bawri | (ii) | Wastage of water |
| (c) | Snow | (iii) | Water management |
| (d) | Drip irrigation | (iv) | Small water |
| (e) | Leaking taps | (v) | Water table |
