When a current is passed through a solution of salt water, sodium chloride decomposes according to the following reaction: NaCl + H2O → NaOH + Cl2 + H2 Balance the equation. Choose "blank" if no coefficient is needed. NaCl + H2O → NaOH + Cl2 ++ H2

The answer to your question is   2NaCl  + 2H₂O    ⇒   2NaOH  +  Cl₂  +  H₂

Explanation:

Original chemical equation

                   NaCl  +  H₂O    ⇒   NaOH  +  Cl₂  +  H₂

                   Reactant      Element        Products

                       1                    Na                    1

                       1                    Cl                      2

                       2                    H                      3

                       1                     O                      1

This reactions is unbalanced

                2NaCl  + 2H₂O    ⇒   2NaOH  +  Cl₂  +  H₂

                   Reactant      Element        Products

                      2                    Na                    1

                      2                    Cl                     2

                      4                    H                      4

                      2                     O                     2

Now, the reaction is balanced

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