Frank and Oswalt report a molar absorptivity of 4700 L mol^-1 cm^-1 for thiocyanatoiron(lll) ion. What absorbance would you expect for a soloution that it 1.0e-4 M in thiocyanatorion(lll) ion, if the path length is 1.00 cm?
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A = ebc
A= 4700*1*1.oE-4
A = ?
To calculate the absorbance of a solution using the given molar absorptivity, concentration, and path length, you can use the Beer-Lambert Law.
The Beer-Lambert Law provides a relationship between the concentration of a solute, the path length of the sample, and the absorbance of the solution. The formula is as follows:
Absorbance = molar absorptivity × concentration × path length
In this case, the molar absorptivity is given as 4700 L mol^-1 cm^-1, the concentration of the solution is 1.0e-4 M (moles per liter), and the path length is 1.00 cm.
Now, let's substitute the values into the formula to find the absorbance:
Absorbance = 4700 L mol^-1 cm^-1 × 1.0e-4 M × 1.00 cm
Absorbance = 4700 × 1.0e-4
To calculate this, you simply multiply the two numbers:
Absorbance = 0.47
Therefore, the expected absorbance for a solution that is 1.0e-4 M in thiocyanatoiron(lll) ion, with a path length of 1.00 cm, is 0.47.