Chemistry, 15.02.2020 02:28 gamingisfun
At a wastewater treatment plant, FeCl3(s) is added to remove excess phosphate from the effluent. Assume the following reactions occur: FeCl3 ---> Fe3+ + 3Cl- FePO4 ---> Fe3+ + PO4 3␣ The equilibrium constant for the second reaction is Ksp 1⁄4. What concentration of Fe3+ is needed to maintain the phosphate concentration below the limit of 1 mg P/L?
Answers: 2
needed is, 
![K_{sp}=[Fe^{3+}][PO_4^{3-}]](/tpl/images/0512/1855/b47eb.png)
![\frac{1}{4}=[Fe^{3+}]\times 1.053\times 10^{-5}mol/L](/tpl/images/0512/1855/f5443.png)
![[Fe^{3+}]=2.37\times 10^4M](/tpl/images/0512/1855/0a4ad.png)
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At a wastewater treatment plant, FeCl3(s) is added to remove excess phosphate from the effluent. Ass...
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