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प्रश्न
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?
उत्तर
NaCl, NH3, H2O, CO2 are utilised in the production of washing soda.
The chemical reaction involved can be shown in three steps:
i) Production of sodium hydrogen carbonate:
NaCl + NH3 + H2O + CO2 → NaHCO3 +NH4Cl
ii) Production of anhydrous sodium carbonate upon heating sodium hydrogen carbonate:
2NaHCO3 → Na2CO3 + CO2 + H2O
iii) Production of hydrated sodium carbonate when anhydrous sodium carbonate is dissolved in water:
Na2CO3 + 10H2O → Na2CO3.10H2O
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संबंधित प्रश्न
Name the metal whose carbonate is known as washing soda.
What is the common name of (a) NaHCO3 and (b) Na2CO3.10H2O?
Fill in the following blank:
Chemical formula of washing soda is ..................
State two properties and two uses of washing soda.
Name a sodium compound which is used for making borax and glass.
State two uses each of the following compounds:
Hydrogen
Describe how washing soda is produced starting from sodium chloride (common salt). Write equations of all the reactions involved.
State whether an aqueous solution of washing soda is acidic or alkaline? Give reason for your answer.
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?
