If you use 4 mL of 0.030 M ( textFe^3+ ), 4.0 mL of ( textI^- ), and 1.0 mL of water to make your trial solution, what is the concentration of ( textFe^3+ ) in the resulting mixture?
a) 0.0075 M
b) 0.03 M
c) 0.15 M
d) 0.30 M