Question #20863
HNO2 can act as oth oxidising and reducing agent
Expert's answer
HNO2 can act as both oxidizing and reducing agent. In HNO2 oxidation number of nitrogen is +3 so, it can either lose or gain electrons and hence acts as both reducing as well as oxidizing agent.
Examples:
REACTIONS AS OXIDIZING AGENT:
2HNO2 + 2HI ------------------> 2H2O + 2NO + I2
SO2 + 2HNO2 ------> H2SO4 + 2NO
SnCl2 + 2HCl + 2HNO2 --------> SnCl4 + 2H2O + 2NO
REACTIONS AS REDUCING AGENT:
HNO2 + Br2 + H2O -----------> HNO3 + 2HBr
KMnO4 + 3H2SO4 + 5HNO2 ----------> K2SO4 + 2MnSO4 + 3H2O + 5HNO3
Examples:
REACTIONS AS OXIDIZING AGENT:
2HNO2 + 2HI ------------------> 2H2O + 2NO + I2
SO2 + 2HNO2 ------> H2SO4 + 2NO
SnCl2 + 2HCl + 2HNO2 --------> SnCl4 + 2H2O + 2NO
REACTIONS AS REDUCING AGENT:
HNO2 + Br2 + H2O -----------> HNO3 + 2HBr
KMnO4 + 3H2SO4 + 5HNO2 ----------> K2SO4 + 2MnSO4 + 3H2O + 5HNO3
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