Answer
Procedure
Data
Use the calibration curve to determine the value of the diluted unknowns as indicated in the image below.
At an absorbance value of 0.5, the concentration is 0.036
At an absorbance value of 0.750, the concentration is 0.056
At an absorbance value of 1, the concentration is 0.074
The value of 1.25 is outside the graph but by creating an equation we will have
y=13.146 +0.0226
where we can replace y as the absorbance 1.25 and solve for X (concentration) we get a value of 0.0933 M
At an absorbance value of 1.25 , the concentration is 0.0933
To solve the concentration we can use the formula provided now that we know the diluted concentration.
After applying the formula and calculating the average and standard deviation the complete table looks as follows