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7. An electroplating facility produces a hazardous waste stream containing 1.2 g/L copper(Cu2*). The stream enters a continuous-flow precipitation reactor operated at a pH of 9.5.Will the effluent stream (the

treated water, after sedimentation of the precipitate) meet the drinking water standard for copper of 1.3 mg/L? Support your answer with calculations. \mathrm{Cu}(\mathrm{OH})_{2}(\mathrm{~s}) \leftrightarrow \mathrm{Cu}^{2+}+2 \mathrm{OH}^{-} \quad \mathrm{K}_{\mathrm{s}}=2 \times 10^{-19}

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