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3. Balance this redox reaction in acidic conditions using the half-reaction method. ( 3 marks) Cd(s)+NO3(aq)Cd2(aq)+NO(g) 4. Balance this redox reaction in basic conditions using the half-reaction method. (3 marks) H2O2(aq)+I(aq)I2(s)+H2O(el) 5. Use the oxidation number method to balance the following redox reaction in acidic conditions. (4 marks) Sn2(aq)+Cr2O3(aq)Sn4(aq)+Cr3(aq) 6. Use the oxidation number method to balance the following redox reaction in basic conditions. (4 marks MnO4(aq)+Cl(aq)Mn2+(aq)+Cl2(g)