You will need four different solutions of Fe^2+ that have concentrations in rang

Question

You will need four different solutions of Fe^2+ that have concentrations in range from 1.79x10^-5 to 1.25x10^-4 M. Assuming you want to make 10mL of each solution, calculate how many mL of 1.79x10^-4 M Fe^2+ stock solution are necessary for each

3. Given the data of standard solutions below, determine the concentrations of both KMno, and K,Cr,0, in an unknown solution. Assume that the path length of the cell used to collect this data was 1.00 cm. Hint: The two pure solutions can be used to determine the molar absorptivity for the wavelengths indicated TABLE 2.1 Molar Absorptivity Coefficient at Wavelength Concentration Absorbance (A) (arbitrary units) 440 nm 546 nm 546 ami KMnO, Solution 3.77 x 10- 0.0350 0.886 8.33 x 10 0.308 0.009 Solution Unknown Solution 0.385 0.653 a. Concentration of KMno, in unknown solution: b. Concentration of K,Cr,0, in unknown solution: c. Show your work below.

Explanation / Answer

Four difference solutions for using this is how to crear bieden the following use should bd then used.

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