The true absorbance for a 1.0 x 10 −5 M solution is 0.7526. If the percentage stray light for a spectrophotometer is 0.56%, calculate the percentage by which the apparent concentration deviates from the known concentration.

The percentage deviation is  %

Explanation:

From the question we are told that  

     The concentration is of the solution is

     The true absorbance A = 0.7526

      The percentage of transmittance due to stray light %

Generally Absorbance is mathematically represented as

Where T is  the percentage of true transmittance

    Substituting value  

                  %

The Apparent absorbance is mathematically represented

Substituting values

               = 0.7385

The percentage by which apparent absorbance deviates from known absorbance is mathematically evaluated as

             %  

Since Absorbance varies directly with concentration the percentage deviation of the apparent concentration from know concentration  is

              %

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.