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  2. Lead(II) iodide - Wikipedia

    en.wikipedia.org/wiki/Lead(II)_iodide

    Lead(II) iodide (or lead iodide) is a chemical compound with the formula PbI 2. ... The reaction changes the film's color from yellow to light brown. [12] PbI

  3. Golden rain demonstration - Wikipedia

    en.wikipedia.org/wiki/Golden_rain_demonstration

    When mixed, as the lead from one solution and the iodide from the other combine to form lead(II) iodide (PbI 2), which is insoluble at low temperature and has a bright golden-yellow color. Although this is a reaction solely of the dissociated ions in solution, it is sometimes referred to as a double displacement reaction : [ 1 ]

  4. Lead compounds - Wikipedia

    en.wikipedia.org/wiki/Lead_compounds

    Among the halides, the iodide is less soluble than the bromide, which, in turn, is less soluble than the chloride. [3] Lead(II) oxide is also soluble in alkali hydroxide solutions to form the corresponding plumbite salt. [2] PbO + 2 OH − + H 2 O → Pb(OH) 2− 4. Chlorination of plumbite solutions causes the formation of lead's +4 oxidation ...

  5. Color of chemicals - Wikipedia

    en.wikipedia.org/wiki/Color_of_chemicals

    The color of chemicals is a physical property of chemicals that in most cases comes from the excitation of electrons ... Lead(II) iodide: PbI 2: yellow Ammonium ...

  6. Flame test - Wikipedia

    en.wikipedia.org/wiki/Flame_test

    A flame test involves introducing a sample of the element or compound to a hot, non-luminous flame and observing the color of the flame that results. [4] The compound can be made into a paste with concentrated hydrochloric acid, as metal halides, being volatile, give better results. [5] Different flames can be tried to verify the accuracy of ...

  7. Iodide - Wikipedia

    en.wikipedia.org/wiki/Iodide

    The low solubility of silver iodide and lead iodide reflects the covalent character of these metal iodides. A test for the presence of iodide ions is the formation of yellow precipitates of these compounds upon treatment of a solution of silver nitrate or lead(II) nitrate. [2] Aqueous solutions of iodide salts dissolve iodine better than pure ...

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  9. Methylammonium lead halide - Wikipedia

    en.wikipedia.org/wiki/Methylammonium_lead_halide

    The yellow color originates from the lead(II) iodide precursor. [7] Growth of a [CH 3 NH 3]PbBr 3 single crystal in dimethylformamide at 80 °C. [7] The solubility of MALHs strongly decreases with increased temperature: from 0.8 g/mL at 20 °C to 0.3 g/mL at 80 °C for [CH 3 NH 3]PbBr 3 in dimethylformamide.