- #1

Lancelot59

- 646

- 1

^{2+}ions.

Absorbancy: 0.393

Mass Sample: 0.1950

Slope: 0.2200 mg Fe

^{2+}/L

y Intercept=0.004

So I worked y=mx+b to work out that there was 1.76818182 mg Fe

^{+2}/L

Then I converted to grams, and from there I divided by the molar mass of iron to get a concentration of 3.1662x10

^{-5}M.

I need to find the mass of Iron in the original sample. The lab procedure lists a whole bunch of dilutions that occur along the way. Adding some 1,10-phenanthroline, sodium acetate, and some other things. Do I really need to work all the dilutions back, or is there another way to get the answer?