A student creates the Beer's Law plot for Part 3 and finds the slope to be 3.5 ✕ 10^3. 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.

Calculate the equilibrium concentrations of Fe3+, SCN −, and FeSCN2+

Question

A student creates the Beer's Law plot for Part 3 and finds the slope to be 3.5 ✕ 10^3. 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. 

Calculate the equilibrium concentrations of Fe3+, SCN −, and FeSCN2+

anonymous · Answer

what is the absorbance of 0.700 of? Does the slope characterizes the absorbance of SCN-?

I need this to answer your question

jfraser · Answer

I know this experiment, it's the absorbance of the $[FeSCN]^{+2}$ complex