13. Carbonates Flashcards
1
Q
what is limestone
A
calcium carbonate CaCO3
2
Q
Describe thermal decomposition of limestone
A
heat it strongly, it breaks down into calcium oxide and co2, the reaction is endothermic
3
Q
what is lime/quicklime
A
calcium oxide
4
Q
what is slacked lime
A
calcium hydroxide Ca(OH)2
Made from quicklime by adding water, water is added slowly because the reaction is very exothermic
A solution of Ca(OH)2 in water is limewater
5
Q
Uses of carbonate
A
CaCO3 - extraction of iron, construction of road, neutralise excess acidity in soil and lake, make glass, manufacture of cement
Flue gas desulfurisation - remove sulfur dioxide
