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AgCl is colourless whereas AgI is yellow,because of:

AgCl is colourless whereas AgI is yellow,because of:

Grade:11

1 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
9 years ago
This can be explained on the basic of ionic percentage of the compounds.

Ionic character Percentage : AgCl>AgBr>AgI>Ag2S.

It is generally seen that compounds with more than 20% ionic character are generally colorless.However below 20% shows a shift from orange frm to yellow and finally to black in these compounds with decreasing ionicity or increasing covalent nature.

Also it can be explained based on polarisation effect
It is because of the polarisation effect....
Here the cation is same for all...but...
As the size of anion increases the polarisation increases
and
hence the colour intensity of the compound increases...

N we know that size of I- > Br- > Cl-

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