Name________________________

1) What happens in the Spectrophotometer when a light beam is passed through

a solution that has a certain color or color mixtures ?

2) Define Beer's Law?(First write the formula, and then explain...)

3)Here we have two samples of the same solution. They have the same color intensity

in the first picture where you look from one side..In the second picture with the

same solutions the one on the right has more color intensity if you look from the top..

Describe the reason of seeing different color intensity for the same sample solution

in this pictures..(Hint =Remember Beer's Law)

4) The absorptivity of a particular chemical is 1.2/M·cm. What is the concentration of

a solution made from this chemical if a 1.5 cm sample has an absorbance of 1.80?

5) A solution with a concentration of 0.14M is measured to have an absorbance of 0.38. Another solution of the same chemical is measured under the same conditions and has an absorbance of 0.26. What is its concentration?