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Solution A is analyzed for iron content using colorimetry. A calibration curve (absorbance vs ppm) is...

Solution A is analyzed for iron content using colorimetry. A calibration curve (absorbance vs ppm) is prepared and the equation of the best-fit line is A = 0.0252 C (ppm) - 0.0162. A 5.00-mL aliquot of Solution A is diluted to 100.0 mL and yields an absorbance of 0.314. Calculate the concentration of iron in solution A.

0.65 ppm

2.62 ppm

13.1 ppm

262 ppm
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