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MMLU-Pro / 4479 / Phosphate can be removed from sewage effluent by adding magnesium oxide and…

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question

Phosphate can be removed from sewage effluent by adding magnesium oxide and ammonium ion according to the re- action 5H_2O + H_2PO^-_4 + MgO + NH^+_4 \rightarrow Mg(NH_4)PO_4 \bullet 6H_2O. The magnesium ammonium phosphate hexahydrate (Mg(NH_4)PO_4 \bullet6H_2O) precipitates out. In theory, how much of this could be produced if a city processes 5 million gal. (41.7 million lb.) daily of wastewater containing 30 ppm H_2PO^-_4? (1 pound = 453.59 g.)

category

chemistry

options

  1. 2.866 × 10^3 kg
  2. 5852 kg
  3. 1.433 × 10^4 kg
  4. 1343 kg
  5. 1.433 × 10^3 kg
  6. 585.2 kg
  7. 5.852 × 10^4 kg
  8. 14,330 kg
  9. 1.433 × 10^6 kg
  10. 14.33 kg

src

stemez-Chemistry

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