I don\'t understand how I\'m suppose to find the concentration of solution c usi

Question

I don't understand how I'm suppose to find the concentration of solution c using the graph. So please help me answer 2a. 1. Preparation of the standard iron solutions for the calibration curve eHoomg1m- Concentration of stock iron solution (include units)0.0400md Im Absorbances of solutions: Solution Blank Absorbance Cc 3 ZY9 (d 4 2. Preparation of the vitamin pill solution Brand of vitamin-ae aday Absorbance of solution O Stated iron content CALCULATIONS 1. Preparation of the standard iron solutions Calculate the iron concentration in the solutions prepared for the standard curve. Solution Blank a. Concentration of Iron (mg/mL) 2 0,0024 0.004 Page 4 of 6

Explanation / Answer

You haven’t provided the dilutions; so I do not know how the solution C was prepared from solution B. However, I believe, the linear equation was used to find the concentration of Fe in solution C. The absorbance of solution C is 0.201; put y = 0.201 in the regression equation and get

0.201 = 107.1x + 0.019

====> 107.1x = 0.182

====> x = 0.182/107.1 = 0.0016993 0.00170

The concentration of iron in Solution C was 0.00170 mg/mL; we need the dilutions to proceed further.

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