Question

In the first equation it has taken 2HCl but in second equation it is only HCl?

Answer 1

Bro we have solve chemical equation by balancing them. In first reactant Na has 2 molecule so when product is formed then we have balance it. So by process of balancing equation we have to balance the equation. This process is used in hcl also we know that h2o formed & h has 2 molecule in product so in reactant we have to put 2 in hcl to balance them.

In second equation h20 also formed & but see in reactant there are present 2 molecule of h
first in NaHCO3 & second in HCl. These os why that in second equation there are not 2HCl.


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Answer 2

See on the LHS

It is 2HCl

On RHS it is 2NaCl.......That means Cl is 2

And H is also 2

If we add them we will get 2HCl

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