In acidic medium, ____ is used to balance oxygen atoms in an ionic equation.
Correct answer: C. H2O
- A. H+
- B. OH-
- C. H2O
- D. O
Explanation
In the half-reaction method in acidic medium, H2O is added to the side deficient in oxygen atoms, and H+ is then used to balance hydrogen atoms. OH- is used for balancing in basic medium, so choosing it confuses the two media. The likely alternative is H+, because it is characteristic of acidic solution, but it balances hydrogen rather than oxygen.
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About Balancing Redox Equations
Redox equations are balanced by tracking electron loss and gain through oxidation numbers or the ion-electron method. Work includes identifying oxidizing and reducing agents, balancing atoms and charge in acidic or basic medium, and ensuring that electrons lost equal electrons gained.
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