Question

Consider two different solutions of the same UV-absorbing compound. Upon UV-analysis, Solution B gave an absorbance of 1.0 and Solution A gave an absorbance of 0. 4 at the same wavelength. Solution B is higher in concentration than Solution A by what ratio (or percentage)

Answer 1

We have that the Concentration of solution B is 2.5 times more than solution A's concentration.

UV(Ultra violent) rays

Question Parameters:

Upon UV-analysis, Solution B gave an absorbance of 1.0

Solution A gave an absorbance of 0. 4

Generally the equation for the Absorbance    is mathematically given as

A = e*c*L

Therefore

For A solution  

$0.4 = e*[cA]*L$

For B solution  

$1.0 = e*[cB]*L$

Hence

$\frac{0.4}{ 1} = \frac{[cA]}{ cB}$

[cB] = 2.5 [cA]

Therefore

Concentration of solution B is 2.5 times more than solution A's concentration.

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