What are two examples of oxidation reduction reactions?

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Answer 1 · 2017-06-25T09:34:27

Well combustion of hydrocarbons........is a good example.......

#stackrel(-IV)" CH"_4(g) + stackrel(0)O_2(g) rarr stackrel(+IV)" CO"_2(g) + 2"H"_2O(g) + Delta#

Dioxygen gas has been reduced from #stackrel(0)O# to #stackrel(-II)O#

For general information on oxidation numbers see here.

And reduction of high valent metals, for which I will only present the reduction half-equation.......

#"MnO"_4^(-) +"8H"^(+) + "5e"^(-) rarr "Mn"^(2+) "+ 4H"_2"O"#

Deep red permanganate anion is reduced to almost colourless #Mn^(2+)# or...........

#"Cr"_2"O"_7^(2-) +"14H"^(+) +"6e"^(-) rarr"2Cr"^(3+) + "7H"_2"O(l)"#

Here orange-red dichromate is reduced to green #Cr^(3+)#...