An excess of MgO is shaken with water. The mixture formed is then filtered into test-tube X. An excess of BaO is shaken with water. The mixture formed is then filtered into test-tube Y. Which oxide reacts more easily with water, and which filtrate has the lower pH?
- Abarium oxide, X
- Bbarium oxide, Y
- Cmagnesium oxide, X
- Dmagnesium oxide, Y