Problem- A student mixes 5.00 ml of 0.0020 M Fe(NO3)3 with 2.00 ml of 0.0020 M KSCN solution and 3.00 ml water at a certain temperature. The places a sample of the resulting solution in a spectrometer, and measures the transmittance as 26% at 447 nm.
a) What are the initial concentration of [Fe3+] and [SCN-]?
b) What are the final concentration of [Fe3+], [SCN-] and [FeSCN2+]?
c) What is the measured value of Keq?
Please explain why you chose your answer!