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प्रश्न
Name the sodium compound which is used for softening hard water.
Name a sodium compound used for softening hard water.
उत्तर १
Washing soda (Na2CO3.10H2O)
उत्तर २
Sodium carbonate or washing soda (Na2CO3) is used for softening hard water.
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संबंधित प्रश्न
Name a metal carbonate which is soluble in water.
Name the metal whose carbonate is known as washing soda.
What is the common name of (a) NaHCO3 and (b) Na2CO3.10H2O?
Write the formulae of sodium chloride and sodium carbonate.
What is meant by "water of crystallisation" in a substance? Explain with an example.
Name a sodium compound which is used for making borax and glass.
Describe how washing soda is produced starting from sodium chloride (common salt). Write equations of all the reactions involved.
Consider the following substances:
NaCl, Ca(OH)2, NaHCO3, NH3, Na2CO3, H2O, Cl2, CO2, CaSO4.2H2O, 2CaSO4.H2O, CaOCl2
Which four substances are utilised in the production of washing soda?
Write the name and formula of one salt each which contains:
ten molecules of water of crystallisation
How many molecules of water of crystallisation (per formula unit) are present in:
washing soda?
Write the chemical formula.
Washing soda
Answer the following question.
How is washing soda prepared from sodium carbonate? Give its chemical equation. State the type of this salt. Name the type of hardness of water that can be removed by it?
Correct the mistakes:
- Washing soda is used for making cakes and bread soft, spongy.
- Calcium sulphate hemihydrate is used in textile industry for bleaching cloths.
Chemical formula of washing soda is ____________.
Correct the wrong statement given below:
Magnesium hydroxide is used in whitewashing buildings.
The name of the salt used to remove permanent hardness of water is ______.
