In: Chemistry
for each of the following oxides, indicate whether it is ionic or molecular and whether it is acidic or basic. Then write a balanced equation for the reaction with the oxide and water. SO2(g), CaO(s), Li2O(s), SeO(s), P4O6(s)
SO2(g) : Molecular and Acidic
Because, when sulfur dioxide is dissolved in rain, it makes sulfurous acid in the reaction
SO2 + H2O H2SO3
CaO(s): Ionic and basic
Basic oxides are always oxides of metals. They combine with water to form bases which are usually called metal hydroxides.
CaO(s) + H2O Ca(OH)2
SeO(s): Molecular and Ionic
SeO2 is considered an acidic oxide: it dissolves in water to form selenous acid.
SeO2 + H2O ⇄ H2SeO3
P4O6(s): Molecular and acidic
Phosphorus trioxide reacts with water to form phosphorous acid, reflecting the fact that it is the anhydride of that acid.
P4O6 + 6 H2O → 4 H3PO3