Precipitation Reactions: produce an insoluble solid product called a precipitate when two or more aqueous solutions are combined.
Acid Base Neutralization Reactions: produce salt, water, and sometimes a gas when an acid and base react with and neutralize one another; typically exothermic.
Oxidation-Reduction Reactions: electron transfer reactions; one substance loses electrons while the other gains electrons; charges will change; typically exothermic and gas producing.
Combustion Reactions: exothermic reactions producing carbon dioxide, water, and heat (flame) when hydrocarbons, metals, or nonmetals are reacted with molecular oxygen (O2).
Gas Producing Reactions: involve the formation of a gas, vary but a few basic types include 1. combustion reactions (produced CO2), 2. carbonate ion-acid reactions (produce CO2), 3. acid-metal redox reactions (produce H2), 4. ammonium-hydroxide decomposition (produces NH3), 5. carbonic acid decomposition (produces CO2), 6. sulfite-acid reaction (produces SO2)
- 2C6H6 (l)+ 15O2 (g) → 12CO2 (g) + 6H2O (l)
- CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)
- Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)
- NH4OH (aq) ↔ NH3 (g) + H2O (l)
- H2CO3 (aq) → H2O (l) + CO2 (g)
- K2SO3 (s) + 2HCl → SO2 (g) + 2KCl (aq) + H2O (l)