Heating Marble
by GIPhotoStock Images
Title
Heating Marble
Artist
GIPhotoStock Images
Medium
Photograph - Photograph
Description
Heating marble. A piece of marble (mineral of calcium carbonate, CaCO3) is heated in the flame from a propane Bunsen burner. When heated to 900-1200C, calcium carbonate decomposes into quicklime (calcium oxide, CaO) and carbon dioxide gas (CO2) CaCO3 -> CaO + CO2. Calcium gives the flame a bright orange-yellow color. The color of the flame is determined by the element's emission spectrum which is characteristic to that element. Therefore, flame test can be used as an analytic procedure for identifying elements.
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June 13th, 2022
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