Inorganic Reaction Mechanism | Part 2 | Tricks & Concept | Explained by IITian| Jee Mains, Advanced - Videos

Hello Guys…..In this video, our Mentor MKA Sir has explained inorganic mechanism and remaining two types of reaction viz. Oxidisers-reducers and complexing reaction, which are very helpful for IIT Jee Mains, Advance, BITSAT, NEET and AIIMS. Now, there is no need to mug-up these all reactions.
Basic facts
Consider a situation in which one halogen (chlorine, for example) is reacted with the ions of another (iodide, perhaps) from a salt solution. In the chlorine and iodide ion case, the reaction is as follows:
Cl2 + 2I- = Cl- + I2
The iodide ions lose electrons to form iodine molecules. In other words, they are oxidized.
The chlorine molecules gain electrons to form chloride ions— they are reduced.
This is therefore a redox reaction in which chlorine acts as an oxidizing agent.
In each case, a halogen higher in the group can oxidize the ions of one lower down. For example, chlorine can oxidize bromide ions to bromine:

Cl2+2Br−→2Cl−+Br2
The bromine forms an orange solution. As shown below, chlorine can also oxidize iodide ions to iodine:

Cl2+2I−→2Cl−+I2

The iodine appears either as a red solution if little chlorine is used, or as a dark gray precipitate if the chlorine is in excess.

Bromine can only oxidize iodide ions, and is not a strong enough oxidizing agent to convert chloride ions into chlorine. A red solution of iodine is formed (see the note above) until the bromine is in excess. Then a dark gray precipitate is formed.

Br2+2I−→2Br−+I2
Iodine won’t oxidize any of the other halide ions, except possibly the extremely radioactive and rare astatide ions.
Transition elements have tendency to form complexes more than s and p block elements, which form only a few complexes.

The reason is :-

They have small , highly charged ions.
They have vacant low energy orbitals to accept lone pairs of electrons donated by other groups or ligand .
So they are able to form complexes with the groups which are able to donate an electron pair . These groups are known as ligands.
Many other complex reactions from Complex has been discussed in details inside the lecture. We hope, it would be extremely helpful for your preparation.
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Inorganic Reaction Mechanism (Part-2)

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