Question

how will you prepare the above compound starting from sodium chloride? write all relevant equations involved in the process
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Answer 1

where is your above compound ???

Answer 2

how will you prepare the above compound starting from sodium chloride? write all relevant equations involved in the process

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The complete question is:  

15

i. A chemical compound x is used in glass and soap industry. Identify the compound and give its chemical formula.

ii. How many molecules of water of crystallisation are present in compound x?

iii. How will you prepare the above compound starting from sodium chloride? Write all relevant equations involved in the process.

• i. Sodium carbonate is the chemical compound x used in glass and soap industry.
• The chemical formula of sodium carbonate is Na2CO3.
• ii. 10 molecules of water of crystallisation are present in compound sodium carbonate.
• The chemical formula is Na2CO3 . 10H2O
• iii. When NaCl is reacted with ammonia, carbon-dioxide and oxygen, sodium hydrogen carbonate and ammonium chloride are obtained.
• When the obtained sodium hydrogen carbonate is heated sodium carbonate is obtained along with water and carbon-dioxide.
• Soda ash also called the sodium carbonate when mixed with water gives washing soda also called sodium carbonate dehydrate.
• The chemical equations are:
• NaCl + NH3 + CO2 + H2O -> NaHCO3 + NH4Cl
• NaHCO3  Δ -> Na2CO3 + H2O + CO2
• Na2CO3 + H2O -> Na2CO3 . H2O