How do I chemically descale my kettle?

In fact, scale is a carbonate compound of calcium and magnesium (CaCO3, MgCO3). Acetic acid will perfectly dissolve scale; in fact, it reacts with the salt on the walls of the kettle and forms other salts. These salts are very soluble in water:
CaCO3 + CH3COOH = CO2 (up arrow) + H2O + CH3COOCa.
MgCO3 + CH3COOH = CO2 (up arrow) + H2O + CH3COOMg.
If we look at the solubility table, we see that when both Ca and Mg react with acetic acid, they dissolve in water.

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