Final answer:
In a basic solution, we can add OH⁻ ions to balance the reaction.
Step-by-step explanation:
In a basic solution, we can add OH¯ ions to balance the reaction. By adding an equal number of OH¯ ions to both sides of the equation, we can neutralize the H⁺ ions and simplify the equation.
For the given equation: H₂OCr₂O₇⁻² + 14H⁺ + 3C₂O₄⁻² = 2Cr⁺³ + 7H₂O + 6CO₂
Add 14 OH⁻ ions to both sides of the equation: H₂OCr₂O₇⁻² + 14H⁺ + 14OH⁻ + 3C₂O₄⁻² = 2Cr⁺³ + 7H₂O + 6CO₂ + 14OH⁻
After adding the OH⁻ ions, the reaction is balanced in a basic solution.