Question

Which additional product balances the reaction H2SO4 + 2NaOH → Na2SO4 + ________? 2H2O 2OH H2O2 H3O

Answer 1

Answer: The additional product balances the reaction is $2H_{2}O$.

Explanation:

Given that,

$H_{2}SO_{4}+2NaOH\rightarrow Na_{2}SO_{4} +$

We know that,

The number of atoms of the reactant and the number of atoms of the  product is equal in the reaction.

Therefore,

$H_{2}SO_{4}+2NaOH\rightarrow Na_{2}SO_{4} +2H_{2}O$

Hence, the additional product balances the reaction is $2H_{2}O$.

Answer 2

"Given equation is:

${ H }_{ 2 }{ SO }_{ 4 }\quad +\quad 2NaOH\quad \longrightarrow \quad { Na }_{ 2 }{ SO }_{ 4 }\quad +\quad ?$

According to the law of conservation of mass, the number of atoms on the reactant side should be equal to the number of atoms on the product side. In reactant side, it has 2 atoms of Na, 6 atoms of O, 4 atoms of H and 1 atom of S. But in the product side, it has 2 atoms of Na, 1 atom of S, 4 atoms of O. Hence the remaining 4 atoms of H and 2 atoms of O is missing. Form the given options, 2H2O is the correct one."