Before revision: CaCO3(s) + 2 H +(aq) → Ca2+(aq) + CO2(g) + H2O(l) MgCO3(s) + 2 H +(aq) → Mg2+(aq) + CO2(g) + H2O(l) Strongly acidic descaling agents are usually corrosive to the eyes and skin, and can also attack and degrade clothing fibres, so appropriate protection such as rubber gloves and plastic aprons should be used in cleaning operations.
After revision: CaCO3(s) + 2H +(aq) → Ca2+(aq) + CO2(g) + H2O(l) MgCO3(s) + 2H +(aq) → Mg2+(aq) + CO2(g) + H2O(l) Strongly acidic descaling agents are usually corrosive to the eyes and skin, and can also attack and degrade clothing fibres, so appropriate protection such as rubber gloves and plastic aprons should be used in cleaning operations.