6. The concentration of phenol in a water sample can be determined by a reaction of...

  

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6. The concentration of phenol in a water sample can be determined by a reaction of the phenol with 4-aminoantipyrine and K3Fe(CN)6 at pH = 7.9 to form an antipyrine dye. A treated 4.00 ppm phenol standard has an absorbance of 0.424 at 460 nm in a 1.000 cm cell. A 50.00 mL waste water sample is placed in a 100.0 mL volumetric flask and diluted to volume. After treatment, the absorbance of this solution is found to be 0.394. What is the concentration of phenol, in ppm, in the waste water sample? 6. The concentration of phenol in a water sample can be determined by a reaction of the phenol with 4-aminoantipyrine and K3Fe(CN)6 at pH = 7.9 to form an antipyrine dye. A treated 4.00 ppm phenol standard has an absorbance of 0.424 at 460 nm in a 1.000 cm cell. A 50.00 mL waste water sample is placed in a 100.0 mL volumetric flask and diluted to volume. After treatment, the absorbance of this solution is found to be 0.394. What is the concentration of phenol, in ppm, in the waste water sample?

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