Question

Show how the blank-corrected absorbance for the 10.00 ppm solution was calculated. a) By subtracting the initial absorbance from the blank absorbance

b) By dividing the initial absorbance by the blank absorbance
c) By adding the initial absorbance to the blank absorbance
d) By multiplying the initial absorbance with the blank absorbance

Answer 1

The blank-corrected absorbance for a 10.00 ppm solution is calculated by subtracting the blank absorbance from the initial absorbance of the sample. This corrects for any baseline readings due to non-analyte factors.

Step-by-step explanation:

To calculate the blank-corrected absorbance for the 10.00 ppm solution, the correct approach is to subtract the absorbance of the blank sample from the initial absorbance of the solution. This is because the blank sample absorbance accounts for instrument artifacts, the solvent, and any other components that may be present in the solution but are not of interest. The blank absorbance is a baseline measurement that must be subtracted to get an accurate measurement of the solute's absorbance.

The calculation would follow the equation:

Acorrected = Ainitial - Ablank

Where Acorrected is the blank-corrected absorbance, Ainitial is the initial absorbance measurement of the 10.00 ppm solution, and Ablank is the absorbance measurement of the blank.

Thus, the correct answer is a) By subtracting the initial absorbance from the blank absorbance.