Oxidation Numbers

The oxidation numbers of iron (Fe) can vary depending on the compound it is part of. For example, in FeCl3, iron has an oxidation number of +3, while in FeCl2, its oxidation number is +2. In elemental form, such as in Fe metal, the oxidation number is 0.

Potassium and Lithium

Bromine is in the seventh family on the periodic table. That means that it has seven valence electrons. It wants to have eight valence electrons to be stable, so it will gain an electron, making it negative. The oxidation number of Br is Br-1.

+1 for H

+6 for S

-2 for each O

The iron ion is usually Fe2+. However, iron has multiple oxidation states. Hence, it is also easy for iron to lose 1 more electron to form Fe3+.

Fe2+ ions are further oxidized when it meets an oxidizing agent (e.g. oxygen). Oxygen will remove 1 more electron from the ion to make it Fe3+.

The oxidation number of iron in the brown ring complex is +2. This complex is [Fe(H2O)5NO]2+ where the iron atom is in the +2 oxidation state.

The oxidation number of Li in LiBr is +1, and the oxidation number of Br is -1.

The oxidation number of magnesium in MgO is +2. Magnesium typically forms ions with a +2 charge, while oxygen typically forms ions with a -2 charge. In MgO, the overall charge of the compound is neutral, so the oxidation number of magnesium must be +2 to balance the -2 charge of oxygen.

1. Identify the atoms in the compound
2. Assign oxidation numbers to each atom based on electronegativity and known rules
3. Sum the oxidation numbers to match the overall charge of the compound
4. Balance the equation if necessary to ensure conservation of charge

The oxidation number of carbon in PbCO3 is +4. This can be determined by assigning oxygen an oxidation number of -2 and lead an oxidation number of +2, and then solving for the oxidation number of carbon using the overall charge of the carbonate ion.

The oxidation number of hafnium (Hf) typically ranges from +2 to +4 in its compounds.

No, the oxidation number of an atom is typically shown as a positive or negative number (or zero) that represents the charge it would have in a compound or ion. Positive oxidation numbers indicate loss of electrons, while negative oxidation numbers indicate gain of electrons.

In POCl3, oxygen typically has an oxidation number of -2, and there are three oxygen atoms, giving a total oxidation number of -6. Since the overall charge of the molecule is neutral, the sum of the oxidation numbers must equal zero. Therefore, the oxidation number of phosphorus in POCl3 is +3.

The oxidation number for Li, or Lithium, is Li+1. Lithium is in the first family on the Periodic Table. Since the element wants to become stable, and it only it needs 8 valence electrons. So therefore, it has to lose an electron. Losing an electron will make it a positive oxidation number.

In Fe3O4, the oxidation number of Fe is +8/3. This can be found by setting up an equation where the total sum of the oxidation numbers in the compound equals the overall charge. In this case, Fe3O4 has a neutral charge, so the total sum of oxidation numbers is zero.

Since H6 = +1 x6 = +6 and O= -2 . You are left with +4, therefore each C atom has -2

The oxidation number of phosphorus in P4O6 is +3. This is because the sum of the oxidation numbers of all atoms in P4O6 must equal the overall charge of the compound, which is zero.

The four phosphorus atoms each have an oxidation number of +3, as oxygen is usually assigned an oxidation number of -2 and there are a total of six oxygen atoms in the compound.

Lets say the oxidation number of Mn is x

oxygen's oxidation number is -2

and the charge on the molecule is 1-

so:

1(x) + 4(-2) = 0

x - 8 = 0

x = +8

and then you must remember that there is a negative charge to the molecule. Subtract 1.

therefore oxidation number on Mn is +7

The oxidation number of sulfur can vary depending on the compound. In general, sulfur has oxidation numbers ranging from -2 to +6. In common compounds like H2S (hydrogen sulfide), sulfur has an oxidation number of -2, while in compounds like SO2 (sulfur dioxide) its oxidation number is +4.

The algebraic sum of the oxidation numbers of all atoms in a polyatomic ion is equal to the overall charge of the ion.

The oxidation number of calcium in calcium carbonate (CaCO3) is +2. The oxidation number of oxygen is -2. By comparing the charges in the compound, you can deduce that the oxidation number of carbon in calcium carbonate is +4.

If the question is Cu2, then it is equivalent to Cu and the oxidation number for any element is zero.

If the question is Cu2+, then the oxidation number is +2.

The sum of all oxidation numbers in any compound is zero. This is because atoms in a compound are electrically neutral, and the oxidation numbers reflect the charge of the atoms when they gain or lose electrons.

The oxidation number for sodium (Na) is +1. Sodium typically loses one electron to achieve a stable electron configuration.

Phosphorous, or P, has a zero oxidation number in the element.

Common oxidation numbers are:-

It has a -3 in phosphides, where it forms the P3- ion

It has a +3 in oxidation number in for example P4O6, and PCl3

It has a +5 oxidation number in for example P4O10 and PCl5