Iron (III) ions and thiocyanate ions react according to the following equation:F

Question

Iron (III) ions and thiocyanate ions react according to the following equation:Fe^3+(aq) + SCN (aq) implies FeSCn^2+(aq) For this reaction, a student prepares four standard solutions in which varying amounts of NaSCN are used. For the reaction, 0.200 M Fe(N0_3)_3 and 0.00200 M NaSCN are used. The total volume of each reaction mixture is 50.0 mL. Use the information provided to help you fill in the missing values in parts b, c, and d in Table 1 below. Table 1: Concentration and Absorbance Data for Standard Solutions

Explanation / Answer

1 2 3 4

a 0.50 1.25 2.50 3.75

b 1.0 x 10-6 2.5 x 10-6 5.0 x 10-6 7.5 x 10-6

c 2.0 x 10-5 5.0 x 10-5 1.0 x 10-4   1.5 x 10-4

d 2.0 x 10-5 5.0 x 10-5 1.0 x 10-4   1.5 x 10-4

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