Ag+ is complexed by the chelating ligand trien (triethylenetetramine, NH2(CH2)2NH(CH2)2NH(CH2)2NH2). Ag+ + trien ⇌ Ag(trien)+ Kf = 5.0×107 40.8 mL...

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Chemistry

Ag+ is complexed by the chelating ligandtrien (triethylenetetramine,NH2(CH2)2NH(CH2)2NH(CH2)2NH2).

Ag+ + trien ⇌ Ag(trien)+Kf = 5.0×107

40.8 mL of 0.0273-M trien solution is added to 25.0 mL of0.0146-M silver nitrate solution.
What is [Ag+] at equilibrium?

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4.4 Ratings (822 Votes)

                              Ag+ + trien ⇌ Ag(trien)+

             no of moles of trin = molarity * volume in L

                                        = 0.0273*0.0408   = 0.00111moles

          no of moles of AgNo3 = molarity * volume in L

                                               = 0.0146*0.025   = 0.000365 moles

                 Ag+    +    trien    ⇌      Ag(trien)+

      I        0.000365         0.00111             0

     C       -0.000365      -0.000365           0.000365

    E          0                    0.000745 0.000365

x

Kf = Ag(trien)+ /[Ag+][trien]

             5*107   = 0.000365/x*0.000745

            x           = 0.000365/5*107*0.000745    = 9.8*10-9 M

         [Ag+] = x = 9.8*10-9 M >>>>> answer


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