Question

Определить степени окисления в чоединениях: 1) Al2o32) CO3)OF23)N2O 5)H2S6)Cum(NO3)27HNO38)PbS​

Answer 1

Al2(+3)O3(2-)

C(2+)O(2-)

O(2-)F2(+1)

N2(+1)O(-2)

H2(+1)S(-2)

Cum(NO³)2 O³(2-) N(+4) Cu(+2)

H(+1)N(+5)O3(-2)

Pb(+4)S2(-2)

Answer 2

1) Al2O3: The oxidation state of Al (Aluminum) in its compounds is usually +3. Oxygen is usually -2. In Al2O3, there are two aluminum atoms. Since the overall charge of the compound is neutral, the sum of the oxidation states must be zero. Therefore, the oxidation state of each aluminum atom is +3. The oxidation state of oxygen is -2, and there are three oxygen atoms in Al2O3.

2) CO3: The oxidation state of C (Carbon) in its compounds is usually +4. Oxygen is usually -2. In CO3, there is one carbon atom. Since the overall charge of the compound is 2-, the sum of the oxidation states must be -2. Therefore, the oxidation state of carbon must be +4. The oxidation state of oxygen is -2, and there are three oxygen atoms in CO3.

3) OF2: The oxidation state of O (Oxygen) is usually -2. In OF2, there are two oxygen atoms. Since the overall charge of the compound is zero, the sum of the oxidation states must be zero. Therefore, the oxidation state of each oxygen atom is -1. The oxidation state of F (Fluorine) is -1.

4) N2O: The oxidation state of N (Nitrogen) in its compounds is usually -3 or +5. Oxygen is usually -2. In N2O, there are two nitrogen atoms. Since the overall charge of the compound is zero, the sum of the oxidation states must be zero. Therefore, the oxidation state of each nitrogen atom is +1. The oxidation state of oxygen is -2.

5) H2S: The oxidation state of H (Hydrogen) in its compounds is usually +1. S (Sulfur) can have various oxidation states. In H2S, the oxidation state of sulfur is -2 since hydrogen is +1 and there are two hydrogen atoms.

6) Cu(NO3)2: The oxidation state of Cu (Copper) is usually +1 or +2. The oxidation state of N (Nitrogen) in its compounds is usually -3 or +5. Oxygen is usually -2. In Cu(NO3)2, there is one copper atom. Since the overall charge of the compound is zero, the sum of the oxidation states must be zero. Therefore, the oxidation state of copper is +2. The oxidation state of nitrogen in nitrate (NO3) is -2, and there are two nitrate ions. The overall charge of nitrate is -1. Therefore, the oxidation state of each nitrogen atom is +5. The oxidation state of oxygen is -2.

7) PbS: The oxidation state of Pb (Lead) is usually +2. The oxidation state of S (Sulfur) can be -2. In PbS, there is one lead atom. Since the overall charge of the compound is zero, the sum of the oxidation states must be zero. Therefore, the oxidation state of lead is +2. The oxidation state of sulfur is -2.