Classify each substance as being either a molecular compound or an ionic compound. Determine whether it will dissolve in water and whether it is classified as an electrolyte or a non-electrolyte.

Question

1. CH4(g)
2. Li2O(s)
3. AlCl3(s)

Answer 1

CH4 is a molecular compound, it is insoluble (essentially) in water, and non-electrolytes.
Both Li2O and AlCl3 are ionic compounds, they dissolve in water, solutions are electrolytes.