CO₃²⁻
carbonate
CO₃²⁻ is the chemical formula for carbonate, which is a polyatomic ion that has a -2 charge. Carbonate ion contains one carbon atom and three oxygen atoms, arranged in a trigonal planar geometry.
Carbonate ion is important in various chemical reactions and is involved in the formation of various compounds, including carbonates, bicarbonates, and oxides. For example, when a carbonate reacts with an acid, it produces a salt, carbon dioxide gas, and water, as shown in the following chemical equation:
CO₃²⁻ + 2H⁺ → CO₂ + H₂O
In addition to being involved in chemical reactions, carbonates are also important minerals in earth sciences, and their presence can give clues to geologists about the conditions under which rocks were formed.
It is also important to note that the carbonate ion is a weak base, as it can accept protons from an acid to form bicarbonate and water, as shown in the following reaction:
HCO₃⁻ + H⁺ → H₂CO₃
Overall, the carbonate ion plays an important role in many areas of chemistry and earth science.
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