<Li> Insoluble in alcohol . </Li> <Tr> <Td> Basicity (pK) </Td> <Td> 1.37 (first OH), 2.43 (second OH) </Td> </Tr> <Tr> <Td> Magnetic susceptibility (χ) </Td> <Td> − 22.0 10 cm / mol </Td> </Tr> <Tr> <Td> Refractive index (n) </Td> <Td> 1.574 </Td> </Tr>

In the compound ca(oh)2 what is the oxidation number of the o