Question

Complete and balance the following redox reactions in acidic medium, be sure to label the oxidizing and reducing agents in each.

S(s) + HNO3(aq) → H2SO3(aq) + N2O(g)

BrO3 - (aq) + N2H4(g) → Br- (aq) + N2(g)

Complete and balance the following redox reactions in basic medium, be sure to label the oxidizing and reducing agents in each.

NO2 - (aq) + Al(s) → NH4 + (aq) + AlO2 - (aq)

H2O2(aq) + ClO2(aq) → ClO2 - (aq) + O2(g)

Answer 1

BALANCED EQUATION:

The half-reactions are;

Half oxidation reaction	Half reduction reaction

As the reaction is taking place in acidic medium,proton and water molecules can be added in either side of the reaction followed by the charge balancing by electron addition.

after balancing the half equations,we get-

.........eq.1

........eq.2

after balancing these two equation, we get,

here,Oxidising agent is HNO_3(aq) and Reducing agent is S_(s)

Half oxidation reaction	Half reduction reaction

As the reaction is taking place in acidic medium,proton and water molecules can be added in either side of the reaction followed by the charge balancing by electron addition.

after balancing the half equations,we get-

.......eq.1

......eq.2

after balancing these two equation, we get,

Here Oxidising agent is BrO₃-_(aq)  and reducing agent is N₂H_4(g)

Half oxidation reaction	Half reduction reaction

As the reaction is taking place in basic medium,hydroxide ion and water molecules can be added in either side of the reaction followed by the charge balancing by electron addition.

after balancing the half equations,we get-

.......eq.1

.....eq.2

after balancing these two equation, we get,

here,the oxidising agent is NO₂^-_(aq) and the Reducing agent is Al_(s)

Half oxidation reaction	Half reduction reaction

As the reaction is taking place in basic medium,hydroxide ion and water molecules can be added in either side of the reaction followed by the charge balancing by electron addition.

after balancing the half equations,we get-

....eq.1

........eq.2

after balancing these two equation, we get,

here the Oxidising agent is ClO₂ and the reducing agent is H₂O₂