What is the concentration of a solution if the absorbance is 0.66 and the constant (a x b) is 8.2 L/mol?
A = a*b*c
0.66 = a*b*c
calculate c.
Use the equation:
A = abC, with C = concentration
Do the substitutions:
0.66 = (8.2L/mol)(C)
Solve for C. What are the units of your answer?
To find the concentration of a solution, you can use the Beer-Lambert Law, which relates the absorbance of a solution to its concentration.
The Beer-Lambert Law is expressed as A = εbc, where A is the absorbance, ε is the molar absorptivity (also known as the constant, a x b), b is the path length of the solution (usually measured in centimeters), and c is the concentration of the solution in mol/L.
In this case, we are given that the absorbance (A) is 0.66 and the constant (a x b) is 8.2 L/mol. We need to find the concentration (c).
Rearranging the equation, we get c = A / (εb).
Plugging in the values, we have c = 0.66 / (8.2 L/mol x b).
Note that we need to know the path length (b) in order to calculate the concentration. If the path length is not provided, you will need that information to find the concentration.
Once you have the path length (b), you can substitute it into the equation and calculate the concentration.