How to identify the valency of iron(having variable valency 3 and 2) in a chemical reaction please help me?

Question

Answer

Ye topic thoda high thinking ka jo ki 11th mein aata hai...So here is ur Answer

Iron does not have 8 valence electrons, it only has 2, here's why.

Oxidation state depends upon the valence electrons and valence electrons are the electrons present in the outer most shell of an atom For Fe, n=4, N shell,

In Iron the electronic configuration of Fe = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶

from the electronic configuration and the below diagram you may have a clear idea about valence electrons in the Fe

i.e., Iron has only 2 valence electrons.

For Fe when two 4s electrons are removed, it has a +2 oxidation state and

electronic configuration of Fe⁺² = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶

Now, the n=3 becomes the outer most shell, iron can lose electrons from this shell as well more specifically from the 3d subshell which has 6 electrons.

when one electron from 3d subshell s removed, iron has a +3 oxidation state and

electronic configuration of Fe⁺³ = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵+2 and +3 are the common oxidation states of Iron

Answer

Its really a nice question but if you are a student of class 10 or below than it,
You just understood that it is a topic of class 11 but don't worry I will tell you a very easy concept of your level which is really correct.

Your question is how to identify the valency of iron(having variable valency 3 and 2) in a chemical reaction)?

----- During a chemical reaction if a compound is Ferrous oxide (Iron-ll oxide) it means irons has 2 valency, you can identify it by Ferrous means 2.

----- If there is ferric oxide (Iron-lll oxide) then the valency of iron is 3. You can identify it by Ferric which means 3.

Friends I wish you understand it.
THANKS.

Answer

One way to identify the valency of iron (Fe) in a chemical reaction is by analyzing the other elements or compounds involved in the reaction. Here are some steps to follow:

1. Determine the formula of the compound that contains iron. For example, FeCl3 is iron trichloride, and FeO is iron(II) oxide.

2. Identify the charge of the other elements or compounds in the formula. For example, in FeCl3, chlorine (Cl) has a charge of -1, so the total charge of the three Cl atoms is -3. In FeO, oxygen (O) has a charge of -2, so the total charge of the O atom is -2.

3. Use the principle of electroneutrality to determine the charge on the iron ion. Electroneutrality means that the total positive charge on the cations in a compound must equal the total negative charge on the anions. For example, in FeCl3, the total negative charge is -3, so the positive charge on the Fe ion must be +3 to balance the charges. In FeO, the total negative charge is -2, so the positive charge on the Fe ion must be +2 to balance the charges.

4. Determine the valency of iron based on the charge on the ion. In FeCl3, the charge on the iron ion is +3, so the valency of Fe is 3. In FeO, the charge on the iron ion is +2, so the valency of Fe is 2.

5. Check if the valency of iron is consistent with its known variable valency. Iron can have a valency of either 2 or 3, depending on the compound it forms. If the valency determined in the reaction is not consistent with the known valencies of iron, then there may be errors in the calculation or other factors affecting the reaction.

In summary, identifying the valency of iron in a chemical reaction involves analyzing the charges of the other elements or compounds in the formula, using the principle of electroneutrality to determine the charge on the iron ion, and checking the consistency of the valency with the known variable valency of iron.

Similar Class 10 Doubts

A carbon compound X having one carbon atom in it reacts with chlorine repeatedly in the presence of sunlight to give a compound Y which doesn't have any hydrogen atom in it. Identify X, Y and the type of reaction. Write the chemical equations involved in this reaction?

"P" is a white crystalline solid.On heating changes to yellow solid " Q".A colurless gas "R" is evolved and a reddish brown gas "S" is also evolved.Answer a.Identify P Q R andS b.Identify the type of reaction. c Write the balanced chemical equation.

Define a chemical reaction. State four observations which help us to determine that a dchemical reaction has taken place. Write one example of each observation with a balanced chemical equation?

what happens when silver nitrate is exposed to sunlight write the chemical equation for the reaction and also mention one use of such a reaction Related: NCERT Solutions - Chemical Reactions & Equations?

Top Courses for Class 10View all

Science Class 10

Social Studies (SST) Class 10

Mathematics (Maths) Class 10

English Grammar Advanced

English Grammar Basic

Top Courses for Class 10

Top Courses for Class 10

Suggested Free Tests

Related Content

About Class 10

Class 10 Study Material

Class 10 All Subjects

NCERT Textbook Solutions

Other Classes

Important Links

Company