COMEDK2023Evening ShiftChemistryRedox ReactionsActual
In the given Redox equation, identify the stoichiometric coefficients w , x , y and z . ClO ₃⁻¹+ w Cl ⁻¹+ xH ⁺ y H ₂ O + zCl ₂
Options
- Aw=6 x=5 y=2.5 z=3
- Bw=5 x=6 y=3 z=3
- Cw=7 x=6 y=3 z=4
- Dw=3 x=6 y=3 z=2
Correct answer
B. w=5 x=6 y=3 z=3
Step-by-step solution
The given redox reaction is ClO ₃⁻ + w Cl ⁻ + x H ⁺ y H ₂ O + z Cl ₂ . First, identify the oxidation states of chlorine. In ClO ₃⁻ , the oxidation state of Cl is +5 . In Cl ⁻ , it is -1 . In Cl ₂ , it is 0 . The reduction half-reaction is ClO ₃⁻ + 6 H ⁺ + 5 e ⁻ 1 2 Cl ₂ + 3 H ₂ O . The oxidation half-reaction is Cl ⁻ 1 2 Cl ₂ + 1 e ⁻ . To balance the electrons, multiply the oxidation half-reaction by 5: 5 Cl ⁻ 5 2 Cl ₂ + 5 e ⁻ . Adding the two half-reactions: ClO ₃⁻ + 5 Cl ⁻ + 6 H ⁺ 1 2 Cl ₂ + 5 2 Cl ₂ + 3 H ₂ O .