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ICSE Class 9 Answered

How to balance the equation NA2HCO3 + H2SO4     =     NA2SO4 + H20 + CO2
Asked by ayush421301 | 15 May, 2018, 05:50: PM
answered-by-expert Expert Answer
  Skeletal equation is:
 
NaHCO3 + H2SO4   →  Na2SO4 + H2O + CO2
 
        LHS                                RHS
Na      1                                   2
H        3                                   2
C        1                                   1
O        7                                   7
 
 
Lets balance Sodium atom on both side by multiplying NaHCO3 with 2, we get,
 
But by multiplying it by 2 the no. of other are also changed on LHS, mention below
 
 2NaHCO3 + H2SO4   →  Na2SO4 + H2O + CO2
 
        LHS                                RHS
Na      2                                   2
H        4                                   2
C        2                                   1
O       10                                  7
 
let's balance carbon, hydrogen, and oxygen on RHS by multiplying H2O & CO2 with 2, we get 
 
 
 2NaHCO3 + H2SO4   →  Na2SO4 + 2H2O + 2CO2
 
 
Let's count atoms of both sides,
 
         LHS                                RHS
Na       2                                   2
H        4                                    4
C        2                                    2
O       10                                  10
 
We get, LHS = RHS which means now the reaction is balanced.
 
The balanced reaction is:
 
 
 2NaHCO3 + H2SO4   →  Na2SO4 + 2H2O + 2CO2
Answered by Ramandeep | 16 May, 2018, 11:14: AM
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