Mmiri ozuzo ọla edo

Reagents dị ngwa ngwa - nnu ọ bụla soluble nke lead na potassium iodide - ga-enye ohere maka nnwale na-atọ ụtọ. Otú ọ dị, n'oge nnwale ahụ, anyị aghaghị icheta ịkpachara anya karịsịa mgbe ị na-arụ ọrụ na ogige ndị na-egbu egbu. N'oge ule ahụ, anyị adịghị eri ihe ma ọ bụ ṅụọ ihe ọṅụṅụ, ma mgbe anyị rụsịrị ọrụ, anyị na-eji nlezianya na-asa aka anyị na iko ụlọ nyocha. Na mgbakwunye, ndị a bụ ndụmọdụ na-adịgide adịgide maka onye na-anwale chemist.

Ka anyị kwadebe ndị na-esonụ reagents: ukwuu soluble nnu nke ndu (II) - nitrate (V) Pb (NO)₃)₂ ma ọ bụ acetate (CH₃Onye isi ọrụ)₂Pb- na potassium iodide KI. Anyị na-akwadebe ihe ngwọta site na ha na ntinye nke ruru 10%. A na-awụsa ihe ngwọta nnu ndu n'ime ite ahụ, wee tinye obere olu nke ngwọta KI. Mgbe ọ kpalitere mmiri mmiri ahụ, mpụta odo nke ndu (II) iodide PbI na-etolite ozugbo.₂ (foto 1):

Pb²⁺ + 2m^- → PbI₂↓

Zenarị ngwọta potassium iodide ngafe ka ihe na-agbaze na-agbaze na ion iodide dị elu (mgbagwoju anya K).₂[PbI₄]).

Mmiri na-acha odo odo na-esiwanye ike na mmiri ọkụ. Mgbe etinyere flask ahụ n'ime nnukwu arịa mmiri esi mmiri (ma ọ bụ kpoo ya n'elu ọkụ ọkụ), n'oge na-adịghị anya mmiri ozuzo na-apụ n'anya na enweghị agba (foto 2) ma ọ bụ naanị ihe ngwọta na-acha odo odo. Ka flask ahụ na-ajụ oyi, kristal na-amalite ịpụta n'ụdị mbadamba ọla edo (foto 3). Nke a bụ mmetụta nwayọọ nwayọọ kristal nke lead(II) iodide kpatara site na obere solubility nke nnu na coolant. Mgbe anyị na-akpali ọdịnaya nke flask na ìhè arịa si n'akụkụ, anyị ga-ahụ aha "ọlaedo ịsa" (chọọ nkọwa nke nnwale a na Ịntanetị n'okpuru aha a). Nsonaazụ ule ahụ yikwara oke mmiri ozuzo oyi nke nwere ihe pụrụ iche - ọla edo - petals (foto nke 4 na 5).

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