Chemical Forums
Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: Mati on November 28, 2019, 03:01:48 PM
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In my chemistry class we are starting some projects and I have come across an issue, I'm not sure how I could determine the mass of nickel or iron in the coin (10 pence).
I can easily find the mass of manganese by colorimetry but when it comes to the other elements (mainly iron and nickel) I can't seem to find a method to successfully determine their mass.
At first I thought I found a solution for nickel, I found that I could use DMG as it forms a colored complex with nickel(II) and I could use citric acid to prevent the DMG from forming a complex with the iron, however from what I read this has to be done in an ammonia solution and since I would be likely dissolve the coin in nitric acid would this produce products that will prevent this reaction or interfere? and would a titration with DMG even be viable for my aim?
Would a gravimetric analysis be better to do for the mass of nickel with DMG?
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For every element analytical methods available.