# An aqueous solution which is #10^-3# #M# absorbs #10 %# of incident light in a path length of #1# #cm#. Calculate concentration of the solution that will absorb #90 %# of the incident light in the same cell?

##### 1 Answer

#### Answer:

#### Explanation:

The absorbance is given by:

In the first case

So in the second case

The Beer - Lambert Law gives us:

Putting in the numbers:

Dividing