Question

Can you solve this example and please show step by step

Example: 10.0 mL aliquots of a natural water sample were pipetted into 50.00 mL volumertric flasks. Exactly 0.00, 5.00, 10.00, 15.00, and 20.00 mL of a standard solution containing 11.1 ppm of Fe^3+ were added to each, followed by an excess of thiocyanate ion to give the red complex Fe(SCN)2+. After dilution to volume, absorbance for the five solutions, measured with a photometer equipped with a green filter, were found to be 0.240, 0.437, 0.621, 0.809, and 1.009 (0.982 cm cells). a) What was the concentration of Fe^3+ in the water sample? (cx =?) b) Calculate the standard deviation of the slope Sm, the intercept Sp, and the concentration of Fe Sc.

Answer 1

Explanation:

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