Advanced Higher Chemistry. Unit 1 The oxides, chlorides and hydrides. Metal oxides. Oxygen is highly electronegative and readily reacts with metals to form ionic metal oxides. Ionic metal oxides tend to be basic i.e. they dissolve in water to form alkalis.
The oxides, chlorides and hydrides
e.g. PCl5(s) + 4H2O(l) H3PO4(aq) + 5HCl(aq)
Note this produces a strongly acidic solution.
e.g. 2NaH(s) + 2H2O(l) H2(g) + 2NaOH(aq)
i.e. 2H- H2 + 2e-