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Which additional product balances the reaction [tex]$H_2SO_4 + 2NaOH \rightarrow Na_2SO_4 + \qquad$[/tex]?

A. [tex]$2H_2O$[/tex]
B. [tex]$2OH$[/tex]
C. [tex]$H_2O_2$[/tex]
D. [tex]$H_3O$[/tex]

Answer :

Answer:

A. 2H2O

Explanation:

Balance the equation to determine which elements remain after forming the Na2SO4:

This is an acid (H2SO4) - base (NaOH) reaction. A slat and water are the products. The salt is Na2SO4.

H2SO4 + 2 NaOH = Na2SO4 + ?

The missing atoms may be determined by summing the individual atoms from what we know:

Atom Reactants Products Missing

H 4 0 4

S 1 1

O 6 4 2

Na 2 2

The ? is composed of 4 H atoms and 2 O atoms. We can predict it is water, H2O, There must be two water molecules to account for the 4 H and 2 O atoms.

The full, balanced equation is:

H2SO4 + 2 NaOH = Na2SO4 + 2H2O

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Rewritten by : Jeany