Metal oxides that dissolve in water react with water to form basic solutions.
BaO (s) + H2O(l) ---> Ba 2+(aq) + 2 OH - (aq)
Nonmetal oxides react with water to from acidic solutions.
CO2 (g) + H2O(l) ---> H2CO3 (aq)
P4O10 (s) + 6 H2O(l) ---> 4 H3PO4 (aq)
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