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प्रश्न
How many molecules of water of crystallisation (per formula unit) are present in:
washing soda?
उत्तर
Washing soda crystals (sodium carbonate crystals) contain 10 molecules of crystallisation in one formula unit. The chemical formula is Na2CO3.10H2O (sodium carbonate decahydrate).
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संबंधित प्रश्न
Give two important uses of washing soda.
What is the common name of (a) NaHCO3 and (b) Na2CO3.10H2O?
State two properties and two uses of washing soda.
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.
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.
Na2CO3.10H2O is ____________.
The name of the salt used to remove permanent hardness of water is ______.
