Tag: metal oxides and non metal oxides

When magnesium oxide reacts with $HCl$, it gives salt and water
$\displaystyle MgO + 2HCl \rightarrow MgCl _2 + H _2O$

When $HCl$ reacts with copper oxide, the black color of copper oxide turns blue due to formation of its corresponding salt i.e. calcium chloride. Water is formed along with salt.

Generally, more metallic character of an element represent, formation of more basic oxide. Likewise, the more non-metallic character an element has, the more acidic oxide. The metallic character of an element can be determined by its position on the periodic table.

$SO _3$ is a non-metallic oxide which is acidic in nature and reacts with base to give a general neutralization reaction by forming a salt and water as

The formation of metal oxide on the surface of metal is called anodizing. For example: aluminium oxide is formed on the surface of aluminium when it is exposed to air which prevents its corrosion.

$Cu(II) oxide\longrightarrow CuO$

Metals oxides will react with dilute acids to give a salt and water. The metal replaces the hydrogen. 

When a metal oxide reacts with a base corresponding salt and water are produced.

Some metal oxides are acidic or amphoteric in nature and form salts with base in neutralization reaction. For example, aluminum oxide reacts with sodium hydroxide to form sodium aluminate.