# Determining Initial and Equilibrium Concentration (Help!!!)

by galaticman
Tags: concentration, determining, equilibrium, initial
 P: 8 1. The problem statement, all variables and given/known data You are given the equation Fe3+ + SCN- -> FeSCN- You are performing an experiment in which you are mixing Fe(NO3)3 and NaSCN. A table is given and I will only list the first sets of data because if i can figure out the process for the first one I can figure out the rest. The table is: 10 mL of 2.0x10-3 M Fe(NO3)3 2mL of 2.0x10-3 Total Volume of Solution: 50mL You are asked to to calculate the initial SCN- concentration (M) as well as the equilibrium FeNCS2+ concentration (M) I am just not sure how to go about doing that. Any help would be greatly appreciated!!!!! NOTE: It also mentions that to assume all of the SCN- is present as FeNCS2+ but I am pretty sure that this is irrelevant and is relevant to the later part of the lab
 Admin P: 22,712 So, if I understand you correctly, you take 2 mL of 2x10-3M solution of SCN-, and you dilute it up to 50 mL (other solution doesn't matter at this moment)? How many moles of SCN- in these 2 mL? What is the concentration of the solution containing this amount of SCN- in a 50 mL volume?
 P: 8 Yup that is pretty much it except it is not just SCN it is NaSCN but Im not sure if that matters for the problem or not?