initial concn Fe(NO3)3 = 2.00E-3 x (5/10) = ?
initial concn KSCN = 2.00E-3 x (5/10) = ?
.........SCN^- + Fe^3+ ==> Fe(SCN)^2+
I.......1E-3....1E-3..........0
C.........-x.....-x...........x
E.......1E-3-x.,.1E-3-x.......x
The problem tells you that x = 1.4E-4M
Evaluate 1E-3 -x, substitute into the Kc expression, and solve for Kc.
Where do NO3^- and K^+ go. They become spectator ions in the solution; ie., one associated with KNO3 and the other two with FeSCN(NO3)2
A student mixes 5 mL of 2.00 x 10^-3 M Fe(NO3)3 with 5 mL 2.00 x 10 ^-3 M KSCN. They find that in the equilibrium mixture concentration of FeSCN^2+ is 1.40 x 10^-4 M.
Find each of the following: the initial concentration in solution for Fe^3+ and SCN, the equilibrium constant for the reaction, and explain what happened to the K and the NO3 ions in the solution.
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