How to use best fit to determine concentration of iron(iii) in the spinach extract

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Use your line of best fit to determine the concentration of iron (iii) in the spinach extract after the addition of 10 ml to spinach ashes.

Oct 13th, 2014

You have measured an absorbance of 0.015 with a corresponding concentration of cmeas=3.38⋅10−3mmolL−1.

The mass of iron in the solution is given by

mFe=cmeasMFe⋅V=0.00378mg

with the volume V=0.02L and molar mass MFe=55.845gmol−1.

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Jun 16th, 2015

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