CO + O2 = CO2

Balanced Chemical Equation – Solution

2CO + O2 → 2CO2

The coefficients show the number of particles (atoms or molecules), and the indices show the number of atoms that make up the molecule. New substances are formed as a result of the rearrangement of the original atoms. As a result of a chemical reaction, atoms of chemical elements do not disappear anywhere and new ones do not appear, their number remains unchanged – this follows from the law of conservation of mass of substances.

Chemical Reaction Information

Carbon Monoxide + Dioxygen = Carbon Dioxide

This is an oxidation-reduction (redox) reaction. CO is a reducing agent, O2 is an oxidizing agent.

  • 2 CII  4 e  2 CIV (oxidation)
  • 2 O0 + 4 e  2 O-II (reduction)

Reaction Type


Substances that react are called starting materials or reactants. The substances that form as a result are called reaction products.


CO – Carbon monoxide

  • Other names: Carbon monooxide.
  • Appearance: Colorless gas.


  • Names: Dioxygen, Oxygen.
  • Appearance: Odourless compressed gas.



  • Names: Carbon dioxide.
  • Appearance: Colorless gas.
Similar Examples of Equalizing a Chemical Reaction

O2 + NaOH + CO → H2O + Na2CO3
O2 + NO + CO → CO2 + NO2
H2O + O2 + Cu + CO → CuCO3*Cu(OH)2
O2 + CO → CO2O3
O2 + CO → CO2

Alexander Stephenson

Candidate of Chemical Sciences, editor-in-chief of Lecturer at several international online schools, member of the jury of chemistry competitions and author of scientific articles.

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