Eduard-Job-Foundation for Thermo- and Matterdynamics

Experiment 4.7: Dissolution of Marble in Hydrochloric Acid

Experiment: Dissolution of Marble in Hydrochloric Acid

Procedure:
Pieces of marble are thrown into hydro-chloric acid.

Observation:
A strong effervescence can be observed.

Explanation:
Calcium carbonate is dissolved by hydrochloric acid, thereby forming gaseous carbon dioxide:

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The combined reactants have a higher chemical potential than the combined products, i.e. the reaction takes place spontaneously.

Video (mpg4, 0:30)