Complete and balance this redox reaction by method of half-reaction methods. What is the coefficient for Cl- ion? Half-reaction: Oxidation reaction and Reduction reaction Oxidation reaction 2Cl- → Cl2 2e- Reducing reaction Cr2O72- 6e- → 2Cr3 7O2- Hint: Balance the number of electrons on both sides Group of answer choices 3 6 2 1