3 HCOOH + K2Cr2O7 + 4 H2SO4 → 3 CO2 + K2SO4 + Cr2(SO4)3 + 7 H2O
This is an oxidation-reduction (redox) reaction:
3 CII - 6 e- → 3 CIV (oxidation)
2 CrVI + 6 e- → 2 CrIII (reduction)
HCOOH is a reducing agent, K2Cr2O7 is an oxidizing agent.
Reactants:
- HCOOH – Formic acid
, Methanoic acid
- Other names: Carbonous acid; Formylic acid; Hydrogen carboxylic acid; Hydroxy(oxo)methane; Metacarbonoic acid; Oxocarbinic acid; Oxomethanol
, Hydrogen carboxylic acid
, Aminic acid
- Appearance: Colorless fuming liquid
; Colourless fuming liquid with pungent odour
; Colorless liquid with a pungent, penetrating odor. [Note: Often used in an aqueous solution.]
- Other names: Carbonous acid; Formylic acid; Hydrogen carboxylic acid; Hydroxy(oxo)methane; Metacarbonoic acid; Oxocarbinic acid; Oxomethanol
- K2Cr2O7 – Potassium dichromate(VI)
- H2SO4 – Sulfuric acid
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