8. Phenol contained in wastewater was determined by coulometric titration based on the reaction C6H5OH 3Br2 = C6H2Br3OH 3HBrg.
It took 4 min 35 s to titrate 10 ml of waste water with bromine generated from potassium bromide at a current of 3.5 mA. Calculate the concentration (µg/l) of phenol in waste water.

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