Reactions of acids with oxides
In a nutshell
Metal oxides react with acid to form a salt and water, similar to that of alkalis. Non-metals react with alkalis to form salt and water.
Equations
Reactants
|
| Products |
acid+metaloxide | | salt+water |
alkali+nonmetaloxide | | salt+water |
Metal oxides
Metal oxides are metal compounds which have an oxygen present.
Example
Iron oxide, Magnesium oxide
Metal oxides with acids
Metal oxides are alkaline and therefore they behave similar to alkaline solutions when reacting with acids. They form a salt and water.
acid +metal oxide→ salt + water
Example
hydrochloric acid + magnesium oxide → magnesium chloride + waterHCl + MgO → MgCl + H2O
Magnesium chloride is the salt produced when hydrochloric acid and magnesium oxide react together.
Hydrochloric\ acid\ + Magnesium\ Oxide \rightarrow\ Magnesium\ chloride\ + water
Non-metal oxides
Non-metal elements such as silicon and sulphur can also react with oxygen to form oxides.
Example
sulfur + oxygen→ sulfur dioxide
Two non-metals, sulfur and oxygen, react to form sulfur dioxide.
Non-metal oxides behave as acids
Non-metal oxides exhibit acidic behaviour and therefore react with acids to form a salt and water.
Example
alkali + nonmetal→salt + water
sodium hydroxide + sulfur dioxide→ sodium sulfate + water
Sodium sulfate is the salt formed when sodium hydroxide and sulfur dioxide react together.
