Question 14 of 17 Incorrect X Incorrect R Incorrect X ncorrect X Incorrect X Map

Question

Question 14 of 17 Incorrect X Incorrect R Incorrect X ncorrect X Incorrect X Map a Sapling Learning macmillan learning A 0.140-mole quantity of Nicl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of N 2+ ions at equilibrium? Assume the formation constant of Ni(NH3e2 is 5.5 x 108 click to edit Number 0.14 M There is a hint available! View the hint by clicking on the bottom divider bar. Click on the divider bar again to hide the hint. Close Previous Give Up & View Solution Check Answer Next Exit Hint

Explanation / Answer

                   Ni+2    + 6NH3 ---------> [Ni(NH3)6]2+

          I      0.14       1.2                     0

           C -0.14       -6*0.14               0.14

        E       0            0.36                   0.14

             Kf   = [Ni(NH3)6]2+/[Ni2+][NH3]6

            5.5*108   = 0.14/x*(0.36)6

            x            = 0.14/5.5*108 *(0.36)6

           x             = 1.17*10-7

         [Ni+2]      = x = 1.17*10-7 M

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