Question

State the brief preparation of washing soda from baking powder . Write the balanced chemical equation of the reaction involved in this process ?

Answer 1

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Preparation :
When we heat baking soda then hydrogen gas released and sodium carbonate left. 
When water is added to sodium carbonate then it becomes washing soda. 
Equation :
2Nahco3 = Na2CO3 +h2O+co2 
Na2CO3 +10h2O =Na2CO3.10H2O 

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Answer 2

preparation of baking soda sodium hydrogen carbonate is produces by reaction with a cold and contested solution of sodium chloride with ammonia and carbon dioxide and water. NACL+NH3 +CO2 +H2O —NAHCO3+NH4CL2. When baking soda is heat it decompose to give sodium carbonate and water and carbon dioxide. preparation of washing soda. sodium hydrogen carbonate is separate from the ammonia chloride by feletion and heated. NACL+H2O+NH3+CO2—NAHCO3+NH4CL2. On heating Nahco3 is decomposition to give Na2co3. NAHCO3—NA2CO3+H2O+CO2. Sodium carbonate is dissolved in water and recrystallized to get washing soda, washing soda crystalline contain 10 molecules of water. NA2CO3+10H2O—NA2CO3.10H2O