London, United Kingdom
Andrew Lambert Photography
Photograph - Photograph
Reaction rates. Image 1 of 2. Large limestone rock (calcium carbonate, CaCO3) reacting slowly with dilute acid to produce carbon dioxide gas bubbles. Here, the relatively small surface area of the limestone results in a slow reaction. This is an acid-base reaction, where calcium carbonate (the base) reacts with the acidic hydrogen (H+) to form aqueous calcium ions & carbonic acid (H2CO3). This acid is unstable, and rapidly decomposes to form carbon dioxide (CO2) & water (H2O) 1) CaCO3 H2O For a fast reaction rate, see image A500/298.
May 13th, 2013
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