effervescence

mineralogy

Written by

The Information Architects of Encyclopaedia Britannica

Last updated

June 26, 2026

Quick Summary

Effervescence in mineralogy refers to the bubbling that occurs when a mineral reacts with an acid, releasing carbon dioxide gas. This reaction is a key test for identifying carbonate minerals.12

For example, when dilute hydrochloric acid is applied to minerals like calcite or aragonite, they bubble vigorously, producing a "fizz" due to the release of carbon dioxide. Other carbonate minerals, such as dolomite, may show a slower effervescence, especially if the mineral is powdered or the acid is warmed. This difference in reaction helps distinguish between minerals like calcite and dolomite in the field. The term effervescence can also describe a lively quality, like the "effervescence of youth".134

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

5 Britannica Sources

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.

calcite
Chemical composition
…reaction is manifested by vigorous effervescence. (The dilution of the HCl usually used is about 90:10 [water:concentrated HCl].) The reactions involved are
Read More
…reaction is manifested by vigorous effervescence. (The dilution of the HCl usually used is about 90:10 [water:concentrated HCl].) The reactions involved are
Read More

mineral
Carbonates
…are frequently identified using the effervescence test with acid. The reaction that results in the characteristic fizz, 2H⁺ + CO2/3→ H₂O + CO₂, makes use of the fact that the carbon-oxygen bonds of the CO₃ groups are not quite as strong as the corresponding carbon-oxygen bonds in carbon dioxide.
Read More
…are frequently identified using the effervescence test with acid. The reaction that results in the characteristic fizz, 2H⁺ + CO2/3→ H₂O + CO₂, makes use of the fact that the carbon-oxygen bonds of the CO₃ groups are not quite as strong as the corresponding carbon-oxygen bonds in carbon dioxide.
Read More

dolomite
Chemical composition
Dolomite effervesces with dilute hydrochloric acid, but slowly rather than vigorously as calcite does; in general, it appears to smolder slowly, and in some cases it does so only after the rock has been powdered or the acid warmed, or both. This difference in the character…
Read More
Dolomite effervesces with dilute hydrochloric acid, but slowly rather than vigorously as calcite does; in general, it appears to smolder slowly, and in some cases it does so only after the rock has been powdered or the acid warmed, or both. This difference in the character…
Read More