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Xiao
Xiao asked in Science & MathematicsChemistry · 8 years ago

Confirming Cations (qual analysis): XSO4 and XCl?

I am in Gen Chem doing qualitative analysis for soluble salts.

Green Salt: XCl2

Blue Salt: XSO4

I know my anions are correct. However, I am unsure about my cations.

What can I add that will give a distinct color to confirm whether what cations I have?

I have deduced that I may have the following cations for my anions:

Green Cl: Ni, Cr, Cu, Fe

Blue SO4: Fe, Cu, Co, Cr

I have HCl, NaOH, NH3, BaCl2, H2S, HNO3, H2SO4, AgNO3, KOH, H2O, (NH4)2C2O4, DMG, H2OH that I can add to a solution of my salt dissolved in water.

Thank you!

2 Answers

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  • Vansig
    Lv 6
    8 years ago
    Favorite Answer

    ammonia solution will form complexes with some of these.

    if you have copper(ii), you get beautiful dark blue;

    cobalt forms an orange complex;

    chromium forms a complex;

    whereas iron does not form any ammonia complex.

    Source(s): http://en.wikipedia.org/wiki/Metal_ammine_complex
  • ?
    Lv 4
    4 years ago

    ok a million. i will take Luna Lovegood :) 2. Definately Aldo. we can be freezing after the North Pole! 3. Gracie 4. Goats on a boat 5. Whoever else desires to bypass we are going to bypass to Honolulu.

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