How do we represent #(i)# represent the reduction of #"chlorate ion"#, #ClO_3^(-)#, to give #ClO_2#?

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And #(ii)# the reduction of #SO_4^(2-)# to #S^(2-)#?

And #(iii)# the oxidation of #Mn^(2+)# to #MnO_2#?

And #(iv)# the oxidation of #Zn# to give #ZnCl_2#?

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Answer 1 · 2016-07-02T18:15:12

See given answer

#ClO_3^(-) +e^(-) +2H^+rarrClO_2 +H_2O ; Cl^(V)rarrCl^(IV), "i.e reduction"#

#SO_4^(2-) + 8H^(+) + 8e^(-)rarrS^(2-) +4H_2O ; S^(+VI)rarrS^(-II), "i.e reduction"#

#Mn^(2+) + 2H_2OrarrMnO_2(s) +4H^(+) + 2e^(-) ; Mn^(+II)rarrMn^(+IV), "i.e oxidation"#

#Zn(s) + 2Cl^(-) rarr ZnCl_2(s) +2e^(-);# #Zn^(0)rarrZn^(+II), "i.e oxidation"#

In all the equations (or so I hope) mass and charge have been conserved, as is required.