Distribute chemical substances by classes, indicate the valence of all elements in the compound P2O5, Al2O3

Distribute chemical substances by classes, indicate the valence of all elements in the compound P2O5, Al2O3, H3PO4, HCI, Mg (OH) 2, CaCI2, K2SO4, KAI (SO4) 2, CaCO3, Cu (NO3) 2

Compound P2O5.

This compound belongs to the class of oxides. Shows acidic properties, as it is able to enter into reactions with bases or basic oxides.
The name of this oxide is phosphorus oxide.
The valence of phosphorus is 5, the valence of oxygen is 2.

Compound Al2O3.

This compound belongs to the class of oxides. Shows amphoteric properties, as it is capable of reacting with both acids and alkalis.
The name of this oxide is aluminum oxide.
The valence of aluminum is 3, the valence of oxygen is 2.

Compound Н3РО4.

This compound belongs to the class of acids.
The name of this acid is phosphoric acid.
The valence of hydrogen – 1, phosphorus – 5, oxygen – 2.

Compound HCl.

This compound belongs to the class of acids.
The name of this acid is hydrochloric acid.
The valency of hydrogen is 1, chlorine is 1.

Compound Mg (OH) 2.

This compound belongs to the class of hydroxides.
It is called magnesium hydroxide.
The valence of magnesium is 2, oxygen is 2, hydrogen is 1.

Compound CaCl2.

The compound is called calcium chloride.
Belongs to the class of salts.
The valence of calcium is 2, the valence of chlorine is 1.

Compound K2SO4.

The compound is called potassium sulfate.
Belongs to the class of salts.
Potassium valency – 1, sulfur – 6, oxygen – 2.

Compound CaCO3.

The compound is called calcium carbonate.
Belongs to the class of salts.
Valence of calcium – 2, carbon – 4, oxygen – 2.

Compound Cu (NO3) 2.

The compound is called copper nitrate.
Belongs to the class of salts.
The valence of copper – 2, nitrogen – 5, oxygen – 2.