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How do you represent the oxidation of #SO_2(g)# by #"nitrous acid"# to give #"sulfuric acid"#?

1 Answer

Dec 13, 2016

#S(+IV)rarrS(+VI)#; #N(+III)rarrN(+II)#

Explanation:

#"Oxidation half equation:"#

#SO_2 +2H_2O rarr H_2SO_4+2H^(+) +2e^-#

#"Reduction half equation:"#

#HNO_2 +H^(+) + e^(-) rarr NO+H_2O#

#"Overall:"#

#SO_2 +2 HNO_2 rarr H_2SO_4 +2NO#

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