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  2. Flame test - Wikipedia

    en.wikipedia.org/wiki/Flame_test

    [7] [8] [6] Sodium is a common component or contaminant in many samples, [2] and its spectrum tends to dominate many flame tests others. [5] The test flame is often viewed through cobalt blue glass to filter out the yellow of sodium and allow for easier viewing of other metal ions. [citation needed]

  3. Ferrous - Wikipedia

    en.wikipedia.org/wiki/Ferrous

    The aquo ligands on iron(II) complexes are labile. It reacts with 1,10-phenanthroline to give the blue iron(II) derivative: When metallic iron (oxidation state 0) is placed in a solution of hydrochloric acid, iron(II) chloride is formed, with release of hydrogen gas, by the reaction Fe 0 + 2 H + → Fe 2+ + H 2

  4. Color of chemicals - Wikipedia

    en.wikipedia.org/wiki/Color_of_chemicals

    Iron(II) Fe 2+ greenish ... Colors of metal ions in flame [2] Name Formula Color ... are produced in a bead test, which is a qualitative test for determining metals.

  5. Fenton's reagent - Wikipedia

    en.wikipedia.org/wiki/Fenton's_reagent

    Solubility of iron species is directly governed by the solution's pH. Fe 3+ is about 100 times less soluble than Fe 2+ in natural water at near-neutral pH, the ferric ion concentration is the limiting factor for the reaction rate. Under high pH conditions, the stability of the H 2 O 2 is also affected, resulting in its self-decomposition. [14]

  6. Nitrate test - Wikipedia

    en.wikipedia.org/wiki/Nitrate_test

    Note that the presence of nitrite ions will interfere with this test. [4] The overall reaction is the reduction of the nitrate ion to nitric oxide by iron(II), which is oxidised to iron(III), followed by the formation of nitrosyl ferrous sulfate between the nitric oxide and the remaining iron(II), where nitric oxide is reduced to NO −. [5]

  7. Qualitative inorganic analysis - Wikipedia

    en.wikipedia.org/wiki/Qualitative_inorganic_analysis

    A yellow-brown precipitate indicates Fe 3+ ion. A white precipitate indicates Ca 2+, Zn 2+, or Pb 2+ ion. The compounds formed are, respectively, basic copper carbonate, iron(II) carbonate, iron(III) oxide, calcium carbonate, zinc carbonate, and lead(II) carbonate. This test is used to precipitate the ion present as almost all carbonates are ...

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