A level Chemistry - reactions to memorise

Lithium ion cell seperate redox equations

1. Li+ + CoO₂ + e^- → Li⁺[CoO₂]^-

2. Li → Li⁺ + e^-

Lithium ion cell overall equation

Li + CoO₂ → Li⁺[CoO₂]^-

Hydrogen fuel cell seperate redox equations (in alkali conditions)

1. H₂ + 2OH^- → 2H₂O + 2e^-

2. O₂ + 2H₂O + 4e^- → 4OH^-

Hydrogen fuel cell overall reaction

2H₂ + O₂ → 2H₂O

Ethanol fuel cell seperate redox equations

1. C₂H₅OH + 3H₂O → 2CO₂ + 12H⁺ + 12e^-

2. 12H⁺ + 3O₂ + 12e^- → 6H₂O

Ethanol fuel cell over all reaction

C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O

Overall reaction between persulfate ions and iodide ions

S₂O₈^2- + 2I^- → 2SO₄^2- + I₂

Equations of Fe²⁺ ions as a catalyst of reaction between persulfate ions and iodide ions

1. S₂O₈^2- + 2Fe²⁺ → 2SO₄^2- + 2Fe³⁺

2. 2Fe³⁺ + 2I^- → 2Fe²⁺ + I₂

Reaction of ethanedioate ions with manganate ions

5C₂O₄^2- + 2MnO₄^- + 16H⁺ → 2Mn²⁺ + 10CO₂ + 8H₂O

Equations of Mn²⁺ catalysing reaction between ethanedioate ions and manganate ions

1. 4Mn²⁺ + MnO₄^- + 8H⁺ → 5Mn³⁺ + 4H₂O

2. 2Mn³⁺ + C₂O₄^2- → 2Mn²⁺ + 2CO₂