The following substances are given: calcium hydroxide, hydrochloric acid, sulfur oxide (VI), water, copper (II) oxide. How many of them will react to each other? Write down the reaction equations.
Bases (including insoluble ones) are capable of reacting with strong acids:
Ca (OH) 2 + 2HCl = CaCl2 + 2H2O.
Bases also react with acidic oxides:
Ca (OH) 2 + SO3 = CaSO4 + H2O.
Water is an amphoteric compound that reacts with soluble acidic and basic oxides:
SO3 + H2O = H2SO4.
Insoluble copper oxide exhibits basic properties and reacts with acids and acidic oxides:
CuO + 2HCl = CuCl2 + H2O;
CuO + SO3 = CuSO4.
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