Limestone reactions in word and symbol equations
.Calcium Carbonate = Calcium Oxide + Carbon Dioxide.
CaCO3 + heat =CaO + CO2.
.Calcium Oxide+ Water = Calcium Hydroxide
CaO + H2O = CaHO2.
.Calcium Hydroxide + Carbon Dioxide = Calcium Carbonate + Water CaHO2+ CO2 = CaCO3 + H2O
These equations do not need balancing, they are already balanced. here is a diagram showing the limestone cycle =============================== it shows that if you heat limestone (calcium carbonate) that it turns into quicklime (calcium oxide) then if you add water it becomes lime water/ hydrated lime (calcium hydroxide) then by adding more water it becomes slaked lime -(putty after 2 months)- and then if you mix the putty with sand and expose to air the plaster will dry and become limestone (calcium carbonate) again !
Another important use of limestone is to neutralise acid. Limestone is ground into a powder which is used to neutralise acidic lakes caused by acid rain and it is used in farming. Soil is measured using an indicator and if it is too acidic, then limestone is mixed into the soil to neutralise it, as some plants can’t grow in too acidic soil.
Limestone is heated to a temperature of...