Problem: Add the stoichiometric coefficients to the equation to balance it.Au(s) + HNO3(aq) + HCl(aq) → HAuCl4(aq) + NO2(g) + H2O(l)

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Au(s) + HNO3(aq) + HCl(aq) → HAuCl4(aq) + NO2(g) + H2O(l)

           Reactant                Product

Au            1                           1

H              2                           3

N              1                           1

O             3                            3

Cl            1                            4 


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Add the stoichiometric coefficients to the equation to balance it.

Au(s) + HNO3(aq) + HCl(aq) → HAuCl4(aq) + NO2(g) + H2O(l)

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