Question

A student took 5.03 mL 0.200 M Fe(NO3)3 solution, added 25.18 mL of DI water, mixed the resulting solution thoroughly and placed the solution in a 50 mL buret. Then, the student took 10.09 mL of this dilute solution from the buret and mixed it thoroughly with 6.21 mL 0.00200 M NH4SCN and 28.65 mL DI water to form the reaction system. What are the initial [Fe3+] and the initial [SCN-] in this reaction system?

( ) [Fe3+]Initial = 7.47 x 10-3 M and [SCN-]Initial = 2.76 x 10-4 M

( ) [Fe3+]Initial = 0.200 M and [SCN-]Initial = 0.00200 M

( ) [Fe3+]Initial = 3.33 x 10-2 M and [SCN-]Initial = 2.76 x 10-4 M

( ) [Fe3+]Initial = 1.01 x 10-3 M and [SCN-]Initial = 1.24 x 10-5 M

Answer 1

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