54.6 MB (889.9 KB compressed)
4370 x 4370 pixels
37.1 x 37.1 cm ⏐ 14.6 x 14.6 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Limestone-acid reaction. Limestone (calcium carbonate, CaCO3) reacting with acid in a test tube. Bubbles of carbon dioxide gas are being produced in the resulting reaction. This is an acid-base reaction, where calcium carbonate (the base) reacts with the acidic hydrogen (H+) to form aqueous calcium ions and carbonic acid (H2CO3). This acid is unstable, and rapidly decomposes to form carbon dioxide (CO2) and water (H2O). This is how rainwater erodes limestone.
Model release not required. Property release not required.