Redox Tutorial Questions 1. An oxidising agent Accepts electrons Donates electrons Accepts protons Donates protons 2. A reducing agent Accepts electrons Donates electrons Accepts protons Donates protons 3. Mg(s) + Cu2+(aq) Mg2+(aq) + Cu(s) In the above reaction, the oxidising agent is Mg(s) Cu2+(aq) Mg2+(aq) Cu(s) 4. Fe3+(aq) + (aq) Fe2+(aq) + I2(s) In the above reaction, the reducing agent is Fe3+(aq) Fe2+(aq) I2(s) 5. The correct redox equation for the reaction of bromine with a solution containing iodide ions is Br2(l) + (aq) + I2(s) Br2(l) + + I2(s) Br2(l) + (aq) + I2(s) Br2(l) + (aq) + I2(s) 6. The correct equation for the reaction of acidified MnO4¯ and Fe2+(aq) is Fe2+(aq) + MnO4¯ + 8H+(aq) Mn2+(aq) + 4H2O(l) + Fe3+(aq) 5Fe2+(aq) + MnO4¯ + 8H+(aq) Mn2+(aq) + 4H2O(l) + 5Fe3+(aq) 5Fe2+(aq) + 2MnO4¯ + 8H+(aq) 2Mn2+(aq) + 4H2O(l) + 5Fe3+(aq) Fe2+(aq) + 5MnO4¯ (aq) + 8H+(aq) 5Mn2+(aq) + 4H2O(l) + Fe3+(aq) 7. H2O2(aq) + 2H+ + ne¯ 2H2O(l) The value of n in the above equation should be 1 2 3 4
Redox Tutorial Questions 1. An oxidising agent Accepts electrons Donates electrons Accepts protons Donates protons 2. A reducing agent Accepts electrons Donates electrons Accepts protons Donates protons 3. Mg(s) + Cu2+(aq) Mg2+(aq) + Cu(s) In the above reaction, the oxidising agent is Mg(s) Cu2+(aq) Mg2+(aq) Cu(s) 4. Fe3+(aq) + Fe2+(aq) + I2(s) In the above reaction, the reducing agent is Fe3+(aq) Fe2+(aq) I2(s) 5. The correct redox equation for the reaction of bromine with a solution containing iodide ions is Br2(l) + + I2(s) Br2(l) + + I2(s) Br2(l) + + I2(s) Br2(l) + + I2(s) 6. The correct equation for the reaction of acidified MnO4¯ (aq) and Fe2+(aq) is Fe2+(aq) + MnO4¯ (aq) + 8H+(aq) Mn2+(aq) + 4H2O(l) + Fe3+(aq) 5Fe2+(aq) + MnO4¯ (aq) + 8H+(aq) Mn2+(aq) + 4H2O(l) + 5Fe3+(aq) 5Fe2+(aq) + 2MnO4¯ (aq) + 8H+(aq) 2Mn2+(aq) + 4H2O(l) + 5Fe3+(aq) Fe2+(aq) + 5MnO4¯ (aq) + 8H+(aq) 5Mn2+(aq) + 4H2O(l) + Fe3+(aq) 7. H2O2(aq) + 2H+ + ne¯ 2H2O(l) The value of n in the above equation should be 1 2 3 4
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