Supplementary Problems

Oxidation-Reduction (RedOx) Reactions: Basic Conditions

Balance the following reactions with the lowest whole number ratio coefficients under basic conditions.
1.	ClO⁻ + CrO₂⁻ → Cl⁻ + CrO₄²⁻	[Solution]
2.	Fe(OH)₂ + CrO₄²⁻ → Fe₂O₃ + Cr(OH)₄⁻	[Solution]
3.	CH₃CH₂OH + MnO₄⁻ → CH₃COO⁻ + MnO₂	[Solution]
4.	ClO₂ → ClO₃⁻ + Cl⁻	[Solution]
5.	[Fe(CN)₆]³⁻ + N₂H₄ → [Fe(CN)₆]⁴⁻ + N₂	[Solution]
6.	C + NO₃⁻ → CO₃²⁻ + NO₂	[Solution]
7.	MnO₄²⁻ → MnO₄⁻ + MnO₂	[Solution]
8.	C₂O₄²⁻ + MnO₄⁻ → MnO₂ + CO₂	[Solution]
9.	MnO₄⁻ + I⁻ → MnO₂ + IO₃⁻	[Solution]
10.	P₄ → H₂PO₂⁻ + PH₃	[Solution]
11.	MnO₄⁻ + CN⁻ → MnO₂ + CNO⁻	[Solution]
12.	CrO₄²⁻ + S₂O₄²⁻ → Cr(OH)₃ + SO₃²⁻	[Solution]
13.	MnO₄⁻ + H₂O₂ → Mn²⁺ + O₂	[Solution]
14.	Cr³⁺ + O₂²⁻ → CrO₄²⁻	[Solution]
15.	CH₃CH₂OH + MnO₄⁻ → CH₃COO⁻ + MnO₂	[Solution]
16.	I₂ + CH₃CH₂OH → I⁻ + CH₃CHO	[Solution]
17.	AlH₄⁻ + H₂CO → Al³⁺ + CH₃OH	[Solution]
18.	MnO₄⁻ + S²⁻ → MnO₂ + S₈	[Solution]
19.	ClO₂ + H₂O₂ → ClO₂⁻ + O₂	[Solution]
20.	NO₂⁻ + Cr₂O₇²⁻ → Cr³⁺ + NO₃⁻	[Solution]
21.	NO₂⁻ + Al → NH₃ + AlO₂⁻	[Solution]
22.	IO₃⁻ + I⁻ → I₃⁻	[Solution]

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Solutions


1.	3ClO⁻ + 2CrO₂⁻ + 2OH⁻ → 3Cl⁻ + 2CrO₄²⁻ + H₂O	[Back to Questions]



2.	6Fe(OH)₂ + 2CrO₄²⁻ → 3Fe₂O₃ + 2Cr(OH)₄⁻ + 2OH⁻ + H₂O	[Back to Questions]



3.	3CH₃CH₂OH + 4MnO₄⁻ → 3CH₃COO⁻ + 4MnO₂ + OH⁻ + 4H₂O	[Back to Questions]



4.	6ClO₂ + 6OH⁻ → 5ClO₃⁻ + Cl⁻ + 3H₂O	[Back to Questions]



5.	4[Fe(CN)₆]³⁻ + N₂H₄ + 4OH⁻ → 4[Fe(CN)₆]⁴⁻ + N₂ + 4H₂O	[Back to Questions]



6.	C + 4NO₃⁻ + H₂O → CO₃²⁻ + 4NO₂ + 2OH⁻	[Back to Questions]



7.	3MnO₄²⁻ + 2H₂O → 2MnO₄⁻ + MnO₂ + 4OH⁻	[Back to Questions]



8.	3C₂O₄²⁻ + 2MnO₄⁻ + 4H₂O → 2MnO₂ + 6CO₂ + 8OH⁻	[Back to Questions]



9.	2MnO₄⁻ + I⁻ + H₂O → 2MnO₂ + IO₃⁻ + 2OH⁻	[Back to Questions]



10.	P₄ + 3OH⁻ + 3H₂O → 3H₂PO₂⁻ + PH₃	[Back to Questions]



11.	2MnO₄⁻ + 3CN⁻ + H₂O → 2MnO₂ + 3CNO⁻ + 2OH⁻	[Back to Questions]



12.	2CrO₄²⁻ + 3S₂O₄²⁻ + 2H₂O + 2OH⁻ → 2Cr(OH)₃ + 6SO₃²⁻	[Back to Questions]



13.	2MnO₄⁻ + 5H₂O₂ → 2Mn²⁺ + 5O₂ + 6OH⁻ + 2H₂O	[Back to Questions]



14.	2Cr³⁺ + 3O₂²⁻ + 4OH⁻ → 2CrO₄²⁻ + 2H₂O	[Back to Questions]



15.	3CH₃CH₂OH + 4MnO₄⁻ → 3CH₃COO⁻ + 4MnO₂ + OH⁻ + 4H₂O	[Back to Questions]



16.	I₂ + CH₃CH₂OH + 2OH⁻→ 2I⁻ + CH₃CHO + 2H₂O	[Back to Questions]



17.	AlH₄⁻ + 4H₂CO + 4H₂O → Al³⁺ + 4CH₃OH + 4OH⁻	[Back to Questions]



18.	16MnO₄⁻ + 24S²⁻ + 32H₂O → 16MnO₂ + 3S₈ + 64OH⁻	[Back to Questions]



19.	2ClO₂ + H₂O₂ + 2OH⁻ → 2ClO₂⁻ + O₂ + 2H₂O	[Back to Questions]



20.	3NO₂⁻ + Cr₂O₇²⁻ + 4H₂O → 2Cr³⁺ + 3NO₃⁻ + 8OH⁻	[Back to Questions]



21.	NO₂⁻ + 2Al + OH⁻ + H₂O → NH₃ + 2AlO₂⁻	[Back to Questions]



22.	3IO₃⁻ + 24I⁻ + 9H₂O → 9I₃⁻ 18OH⁻	[Back to Questions]

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