<Tr> <Td> Solubility in Methanol </Td> <Td> Insoluble (also in diethyl ether, octanol) </Td> </Tr> <Tr> <Td> Acidity (pK) </Td> <Td> 12.8 </Td> </Tr> <Tr> <Td> Magnetic susceptibility (χ) </Td> <Td> − 15.0 × 10 cm / mol </Td> </Tr> <Tr> <Th_colspan="2"> Structure </Th> </Tr>

Calcium oxide reacts with water to form calcium hydroxide