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In a complexometric titration of metal ion with ligand M(Metal ion)+L(Ligand) → C(Complex)
end point is estimated spectrophotometrically (through light absorption).
If ‘M’ and ‘C’ do not absorb light and only ‘L’ absorbs, then the titration plot between
absorbed light (A) versus volume of ligand ‘L’ (V) would look like :

  • Option 1)

  • Option 2)

  • Option 3)

  • Option 4)

 

Answers (1)

As we have learned

Concentration change in a Chemical equilibrium -

A+B\rightleftharpoons C+D

with passage of time, there is accumulation of the products C and D and depletion of  A & B eventually the two reaction occur at same rate.

- wherein

 

 initially ligand consumed by metal due to formation of complex . so absorbed light (A ) remain constant , after complex formation is completed , extra volume of ligand solution increases ligand concentration and also increases absorbed light  


Option 1)

This is incorrect

Option 2)

This is incorrect

Option 3)

This is incorrect

Option 4)

This is incorrect

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Vakul

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