1. Limestone is added to the blast
furnace to remove acidic impurities. What is
the name and chemical formula of the compound that
limestone mainly consists of?
2. In the blast furnace this compound
undergoes thermal decomposition. Write a word equation for this
reaction.
3. What is the chemical equation for
this reaction?
4. Calcium oxide reacts with the
impurity silicon dioxide. Write the chemical equation
for this chemical reaction.
Calcium carbonate - CaCO3
Calcium carbonate(s) ® calcium
oxide(s) + carbon
dioxide(g)
CaCO3(s) ® CaO(s) + CO2(g)
CaO(s) + SiO2(s) ® CaSiO3(l)