Balanced Chemical Equation – Solution
2SO2 + O2 → 2SO3
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
Sulfur Dioxide + Dioxygen = Sulfur Trioxide
This is an oxidation-reduction (redox) reaction. SO2 is a reducing agent, O2 is an oxidizing agent.
- 2 SIV – 4 e– → 2 SVI (oxidation)
- 2 O0 + 4 e– → 2 O-II (reduction)
Reaction Type
Synthesis
Substances that react are called starting materials or reactants. The substances that form as a result are called reaction products.
Reactants:
SO2 – Sulfur dioxide
- Other names: Sulfurous anhydride.
- Appearance: Colorless gas.
O2
- Names: Dioxygen, Oxygen.
- Appearance: Odourless compressed gas.
Products:
SO3 – Sulfur trioxide
- Other names: Sulfuric anhydride.
- Appearance: Colorless to white crystalline solid which will fume in air.
| O2 + SO2 + CaCO3 → CO2 + CaSO4 |
| H2O + O2 + SO2 → H2SO6 |
| H2O + O2 + SO2 → H2SO4 |
| H2O + O2 + SO2 → H2SO8 |
| O2 + SO2 → SO34 |
| O2 + SO2 → SO3 |
| H2O + O2 + SO2 + NaCl → HCl + Na2SO4 |
| O2 + SO2 → SO5 |
| O2 + SO2 + CaO → CaSO4 |
| O2 + SO2 + Fe → Fe2(SO4)3 |
