If a 0.10 m solution of a colored substance has a maximum absorbance at 500 nm and an absorbance of 0.26 at this wavelength, what will be the measured absorbance of a 0.20 m solution at 500 nm?

Answer : The measured absorbance of 0.20 M solution is 0.52

Explanation :

Using the proportionality relationship between concentration and absorbance, we use:

where,

= concentration of solution 1 = 0.10 M

= concentration of solution 2 = 0.20 M

= absorbance of solution 1 = 0.26

= absorbance of solution 2 = ?

Now put all the given values in the above expression, we get:

Therefore, the measured absorbance of 0.20 M solution is 0.52

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