Question

Валентность =H2O /CO2\CaCo3/H3PO4

Answer 1

H2O- H валентность 1, O валентность 2
CO2- С валентность 4, О валентность 2
CaCO3- Ca валентность 2, CO3 валентность 2
H3PO4- H валентность 1, PO4 валентность 3

Answer 2

Valency of Chemical Compounds

The valency of chemical compounds can be determined based on the chemical formulas and the charges of the elements involved. Here's the valency for the given compounds:

1. H2O (Water): - The valency of hydrogen (H) is usually +1, and the valency of oxygen (O) is usually -2. - Therefore, the valency of H2O (Water) is +1 for hydrogen and -2 for oxygen.

2. CO2 (Carbon Dioxide): - Carbon (C) typically has a valency of +4, and oxygen (O) has a valency of -2. - Therefore, the valency of CO2 (Carbon Dioxide) is +4 for carbon and -2 for oxygen.

3. CaCO3 (Calcium Carbonate): - Calcium (Ca) has a valency of +2, and carbon (C) has a valency of +4, while oxygen (O) has a valency of -2. - Therefore, the valency of CaCO3 (Calcium Carbonate) is +2 for calcium, +4 for carbon, and -2 for oxygen.

4. H3PO4 (Phosphoric Acid): - Hydrogen (H) has a valency of +1, phosphorus (P) has a valency of +5, and oxygen (O) has a valency of -2. - Therefore, the valency of H3PO4 (Phosphoric Acid) is +1 for hydrogen, +5 for phosphorus, and -2 for oxygen.

These valencies are based on the typical charges of the elements in these compounds.