Question

Sketch a photometric titration curve for the titration of $S{n}^{2+}$ with $Mn{O}_4^{2-}$. What color radiation should be used for this titration? Explain.

Short answer

The graph is,

Step-by-step solution

Step 1. Given Information

They had given ions and asked about their photometric titration curve.

Step 2. Titration curve

A photometric titration curve is a representation of absorbance as a function of titrant volume, compensated for volume variations.

The photometric titration curve for titration with is as follows:

There is little or no absorbance until the end point of the titration curve shown above. The junction of the extrapolated linear parts of the curve is the end point. The absorbance rises practically linearly with the volume of the titrant after the end point.

The green filter is the color radiation that should be utilized for this titration. This is because the green light is absorbed by the red permanganate solution.