more lights, color & absorption

Question 1

What is absorbance?

Answer 1

A direct measure of how much light is absorbed by a sample

Question 2

What is transmittance?

Answer 2

The ratio of light that passes through a solution

Question 3

How are absorbance and transmittance related?

Answer 3

They are inversely proportional; Th light absorbed by the solution is the absorbance and the light that passes through a solution is the transmittance

Question 4

How does concentration and path length influence the amount of light absorbed by the solution?

Answer 4

Concentration is directly proportional to absorbance, the proportion of light is affected by the number of molecules it interacts with. The path length is also directly proportional to the absorbance, a longer path length will interact with larger molecules, increasing the absorbance

Question 5

Calculate the transmittance of a sample

Answer 5

T = I / Io (initial)

Question 6

Calculate the percentage transmittance of the smaple

Answer 6

%T = ( I/ Io) x 100

Question 7

Calculate the absorbance of the sample

Answer 7

A = - log ( I/ Io) = - log T