Question

Volume of co2 obtained at stp by the complete decomposition of 9.85 g of na2 co3 is?

Answer 1

Answer:

The chemical formula of sodium carbonate (washing soda) is Na2CO3. When it is heated it undergoes a thermal decomposition reaction. This takes place above 500 degree C. The reaction of decomposition is

Na  

2

​  

CO  

3

​  

(s)→Na  

2

​  

O(s)+CO  

2

​  

(g)

The name of the first reaction product Na_2O is Sodium Oxide which is solid and used in glass making and the name of the second reaction product is Carbon Dioxide which is a gas

On calculating this reaction one might get answer 2.08 litres but as Na  

2

​  

CO  

3

​  

is soda ash and it does not decomposes at STP And CO  

2

​  

 does not evolved

So the answer will be zero litres

Explanation: