K2Cr2O7 + C3H8O3 + 4 Cl2 → 2 KCl + 2 CrCl3 + 3 CO2 + 4 H2O

This is an oxidation-reduction (redox) reaction:

3C-2/3-14e-→3CIV(oxidation)

8Cl0+8e-→8Cl-I(reduction)

2CrVI+6e-→2CrIII(reduction)

C3H8O3 is a reducing agent, Cl2 is an oxidizing agent, K2Cr2O7 is an oxidizing agent.

Reactants:

• K2Cr2O7 – Potassium dichromate(VI)
  • Other names: Potassium dichromate , Chromium potassium oxide , Dipotassium dichromium heptaoxide ... show moreDipotassium dichromate , Dipotassium bichromate , Dichromic acid dipotassium salt , Dipotassium dichromate (VI) , Dichromic acid, dipotassium salt , Potassium bichromate show less
  • Appearance: Red-orange crystalline solid ; Orange-to-red crystals
• C3H8O3 – Propane-1,2,3-triol
  • Other names: Glycerol , Glycerin , Glycerine ... show morePropanetriol , 1 , 2 , 3-Trihydroxypropane , 3-Propanetriol , Glycerin (mist) , Gro , Glycyl alcohol , Glyceritol , Trihydroxypropane , Propane1,2,3-triol , IFP , Emery 916 , Osmoglyn , Pricerine 9091 , Glyrol , Mackstat H 66 , RG-S , E 422 , Incorporation factor , Glysanin , Cristal , Tryhydroxypropane , Glyceol Opthalgan , Bulbold , 1,2,3-Propanetriol , 1,2,3-Trihydroxypropane , Glycerin (anhydrous) show less
  • Appearance: Colorless liquid | hygroscopic ; Hygroscopic viscous colourless liquid ; Clear, colorless, odorless, syrupy liquid or solid (below 64°F). [Note: The solid form melts above 64°F but the liquid form freezes at a much lower temperature.]
• Cl2
  • Names: Chlorine , Molecular chlorine
  • Appearance: Greenish-yellow compressed liquefied gas with pungent odour ; Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]

Products:

• KCl
  • Names: Potassium chloride , Sylvite , Muriate of potash ... show moreKlor-Con M15 , K-Lease , Klor-Con 8 , K+10 , K+8 , Klor-Con M10 , Micro-K 10 , Kato , Kaon Cl-10 , Kaon-Cl , Kaon Cl , Micro-K , Klor-Con 10Meq , Klor-Con 10 , Micro-K Ls , K-dur , Klor-Con , Klor-Con M20 , Slow-K , Ten-K , Klotrix , [KCl] , Kaliumchlorid , Chloride of potash , Kaon-CL 10 , Klor-CON , KCl , Monopotassium chloride , K-Tab , Chlorid draselny , Potassium Chloride show less
  • Appearance: White crystalline solid ; Colourless hygroscopic crystals
• CrCl3 – Chromium(III) chloride , Chromium trichloride
  • Other names: Chromic chloride , Chromium(iii) chloride (anhydrous) , Chromium(3+) trichloride ... show moreCrCl3 , Anhydrous chromium(III) chloride , Chromium chloride , Puratronic chromium chloride , Trichlorochromium , Chromic chloride anhydrous show less
  • Appearance: Purple (anhydrous), dark green (hexahydrate) ; Violet crystals
• CO2
  • Names: Carbon dioxide , {{plainlist| , CO2 ... show moreCarbonic acid gas , Dry ice , [CO2] , Carbonic anhydride , R-744 , E-290 , E 290 , E290 , Carbonic acid anhydride , Carbon-12 dioxide , Methanedione , Carbon oxide , CO₂ , [Note: Normal constituent of air (about 300 ppm)]. show less
  • Appearance: Colorless gas ; Odourless colourless compressed liquefied gas ; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.]
• H2O – Water, oxidane
  • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide ... show moreDihydrogen monoxide (DHMO) (systematic name) , Hydrogen monoxide , Dihydrogen oxide , Hydric acid , Hydrohydroxic acid , Hydroxic acid , Hydrol , Μ-oxido dihydrogen , Κ1-hydroxyl hydrogen(0) show less
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas