Gas evolution reaction
A gas evolution reaction is a chemical reaction in which one of the end products is a gas such as oxygen or carbon dioxide.{{Cite web|title=CHEMICAL REACTIONS|url=http://www.ric.edu/faculty/ptiskus/reactions/index.htm|access-date=2020-11-28|website=www.ric.edu}}{{Cite web|date=2017-08-11|title=7.8: Acid–Base and Gas Evolution Reacted|url=https://chem.libretexts.org/Courses/Woodland_Community_College/WCC%3A_Chem_10_-_Concepts_of_Chemistry/Chapters/07%3A_Chemical_Reactions/7.08%3A_Acid%E2%80%93Base_and_Gas_Evolution_Reactions|access-date=2020-11-28|website=Libretexts|language=en}} Gas evolution reactions may be carried out in a fume chamber when the gases produced are poisonous when inhaled or explosive.{{Cite web|title=Gas Evolution - an overview {{!}} ScienceDirect Topics|url=https://www.sciencedirect.com/topics/earth-and-planetary-sciences/gas-evolution|access-date=2020-11-28|website=www.sciencedirect.com}}
Examples
- A replacement reaction concerning zinc metal and dilute sulfuric acid.
:
: In this example, diatomic hydrogen gas is released. Dilute hydrochloric acid can be used in place of dilute sulfuric acid.
- A replacement reaction where gaseous hydrogen chloride and fluorine gas react to release diatomic chlorine gas (because fluorine is more electronegative):
: