A student creates the Beer's Law plot for Part 3 and finds the slope to be 3. 5 ✕ 103. In Part 4, the solution prepared by mixing 5. 0 mL of 2. 0 ✕ 10−3 M NaSCN with 5. 0 mL of 2. 0 ✕ 10−3 M Fe(NO3)3 shows an absorbance of 0. 700.

(a) Calculate the equilibrium concentrations of Fe3+, SCN−, and FeSCN2+.

[Fe3+ ] ___ M

[SCN− ] ___ M

[FeSCN2+ ] ___ M

(b) Calculate Keq.

_____