1,10 phenanthroline forms a bright red complex with iron(II). the complex has an analytical wavelength of 510nm and has a high molar absorptivity. hydroxylamine hydrochloride is added to keep the iron in a reduced +2 state, and the pH is controlled using a acetate buffer. a series of iron(II) phenanthroline solutions were made by adding various ammounts of 4.300X10^-4M Fe^2+ to 5 mL each of hydroxylamine hydrochloride, acetate buffer, and 1,10 phenanthroline. distilled water was added to make the total volume of each solution 50.00mL. the percent transmittance of each solution was read, using a blank containing everything but the iron(II) solution. Data for the determination are..
volume of stock Solution, mL %T
1.00 80.35
2.00 64.71
5.00 33.65
7.00 21.78
9.00 14.09
10.00 11.32
Question 1) calculate the molar concentration of [Fe(phenanthroline)3]2+ in each solution. Show equation.
Question 2) Using the percent transmittances, find equivalent absorbances for each solution. Show equation