We are being asked to balance the given oxidation-reduction reaction. The reaction is under acidic conditions. When balancing redox reactions under acidic conditions, we will follow the following steps.
Step 1: Separate the whole reaction into two half-reactions
Step 2: Balance the non-hydrogen and non-oxygen elements first
Step 3: Balance oxygen by adding H2O to the side that needs oxygen (1 O: 1 H2O)
Step 4: Balance hydrogen by adding H+ to the side that needs hydrogen (1 H: 1 H+)
Balance the following oxidation–reduction reactions that occur in acidic solution.
a. Zn(s) + HCl(aq) → Zn2+(aq) + H2(g) + Cl-(aq)
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Our data indicates that this problem or a close variation was asked in Chemistry - Zumdahl 7th Edition. You can also practice Chemistry - Zumdahl 7th Edition practice problems.