13 Carbonates Flashcards
1
Q
Uses of lime
A
treating acidic soil
neutralising acidic industrial waste products
2
Q
Thermal decomposition of calcium carbonate (limestone)
A
CaCO3 –(heat)–> CaO + CO2
Calcium carbonate –(heat)–> calcium oxide + carbon dioxide
Limestone –(heat)–> lime + carbon dioxide
3
Q
Uses of limestone in the manufacture of iron and cement
A
Iron: CaCO₃ helps remove acidic impurities from the iron by reacting with them to form molten slag
Cement: Heat powdered limestone with clay; it is an ingredient in mortar and concrete
