Redox Reactions

Question 1

what are the redox reactions I need to know?

Answer 1

• interconversions between Fe2+ and Fe3+
• interconversions between Cr3+ and CrO72-
• reduction of Cu2+ and Cu+
• disproportionation of Cu+ and Cu2+ and Cu

Question 2

explain the oxidation of Fe2+ to Fe3+.

Answer 2

• redox reaction between iron(II), iron(III) and manganate ions
• Fe2+ is oxidised to Fe3+
• MnO4- is reduced to Mn2+
• MnO4-(aq) + 8H+(aq) + 5Fe2+(aq) –> Mn2+(aq) + 5Fe3+(aq) + 4H2O()
• MnO4- = purple
• Mn2+ = colourless