Question

Classify this reaction.s this a synthesis, decomposition, single displacement or double displacement reaction?Acid Base? Redox? How do you know this?

Equation for chemiluminescence:

2K₃[Fe(CN)₆] + 2KOH + H₂O₂ → 2K₄[Fe(CN)₆] + 2H₂O + O₂

Answer 1

Redox

Equation for chemiluminescence:

2K₃[Fe(CN)₆] + 2KOH + H₂O₂ → 2K₄[Fe(CN)₆] + 2H₂O + O₂

Redox reaction

Simultaneous oxidation and reduction is taking place in the given reaction

Oxidation –half reaction

H2O2    →O2 +2H⁺ +2e

Oxidation state of oxygen in H2O2=-1

Oxidation state of oxygen in O2=0

Increase in oxidation number/loss of electrons=oxidation

Reduction –half reaction

K₃[Fe(CN)₆]→ 2K₄[Fe(CN)₆]

Or, [Fe(CN)₆]^3-     + e                  ^→[Fe(CN)₆]^4-

Oxidation state of Fe in [Fe(CN)₆]^3-           =+3 (CN- has -1 oxidation number so calculate oxidation number

6(-1)+x=-3 gives x=-3+6=+3]

Oxidation state of Fe in [Fe(CN)₆]^4- =+2 (CN- has -1 oxidation number so calculate oxidation number

6(-1)+x=-4 gives x=-4+6=+2]

Decrease in oxidation state/reduction