Traditional Culture Encyclopedia - Traditional festivals - Is chalk an ionic compound or a valence compound? Why?
Is chalk an ionic compound or a valence compound? Why?
Answer:
The main component of chalk is calcium sulfate, which is a white precipitate and is not easy to decompose. There are two main types of chalk used in China: ordinary chalk and dust-free chalk. Their main components are calcium carbonate (CaCO3, limestone) and calcium sulfate (CaSO4, gypsum), or contain a small amount of calcium oxide.
CaCO3 and CaSO4 are both ionic compounds, while CaO is a common valence compound.
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