Chii chinonzi Precipitation Reaction?
Maitiro ekunaya kwemvura rudzi rwemaitiro emakemikari anowanzoitika muhupenyu hwezuva nezuva uye mumaindasitiri akasiyana-siyana. Mukuita uku, mhinduro mbiri dzine maion anonyungudika dzinosangana, zvichiita kuti chinhu chakasimba chisanyungudike muchinhu chiri pakati nepakati. Chinhu chakasimba ichi chinoumbwa chinonzi precipitate.
Tsanangudzo uye Nheyo Dzekutanga
Kugadziriswa kwemvura kunoitika kana maion ari mumhinduro akabatana kugadzira chinhu chine kunyungudika kwakaderera mumvura. Kunyungudika kuyera kuti chinhu chinogona kunyungudika zvakadii mune chimwe chinhu chinonyungudika patembiricha yakatarwa. Kana chigadzirwa chemhinduro chiine kunyungudika kwakaderera, "chinonaya" kana kuti chinoparadzana nemhinduro yacho muchimiro chakasimba. Muenzaniso wakapfava wekugadzirisa mvura ndewekuti mhinduro ye barium chloride (BaCl₂) inosanganiswa nemhinduro ye sodium sulfate (Na₂SO₄), apo barium sulfate (BaSO₄) isinganyungudike inodonha.
Maitiro aya anogona kunyorwa muchimiro chemakemikari equation seinotevera:
\[ \text{BaCl}_2(aq) + \text{Na}_2\text{SO}_4(aq) \rightarrow 2\text{NaCl}(aq) + \text{BaSO}_4(s) \]
Maitiro aya epakutanga anogona kutsanangurwa uchishandisa mutemo wechinhu chinonyungudika (Ksp). Chinhu chinonyungudika chinoyera maitiro echinhu chinonyungudika mumvura. Kana chinhu chinonyungudika chikapfuura, mvura inonaya inozobuda.
Mienzaniso Yakajairika Yekuitika Kwemvura
1. Kuita kweAgNO₃ neNaCl: Kana silver nitrate (AgNO₃) solution ikasanganiswa nesodium chloride (NaCl), white silver chloride (AgCl) inodonha.
\[ \chinyorwa{AgNO}_3(aq) + \chinyorwa{NaCl}(aq) \museve wekurudyi \zvinyorwa{AgCl}(s) + \zvinyorwa{NaNO}_3(aq) \]
2. Kuita kwePb(NO₃)₂ neKI: Musanganiswa we lead(II) nitrate (Pb(NO₃)₂) uye potassium iodide (KI) solutions unoburitsa yero precipitate ye lead(II) iodide (PbI₂).
\[ \text{Pb(NO}_3\text{)}_2(aq) + 2\text{KI}(aq) \rightarrow \text{PbI}_2(s) + 2\text{KNO}_3(aq) \]
Maitiro Ekuita Nemvura
Maitiro ekunaya kwemvura ane mabasa akasiyana-siyana akakosha musainzi nemaindasitiri:
1. Kurapa Mvura: Mukurapa mvura, maitiro ekunaya kwemvura anoshandiswa kubvisa tsvina inokuvadza. Semuenzaniso, mvura inoshandiswa kubvisa simbi dzinorema dzakadai se lead (Pb²⁺) uye cadmium (Cd²⁺). Mukurapa mvura yakasviba, zvinhu zvakaita se lime (calcium hydroxide, Ca(OH)₂) zvinowedzerwa kuti zviite phosphates kana ma ions esimbi inorema.
2. Kuzivikanwa uye Kuverengwa kweZvinhu: Mukuongorora gravimetric, maitiro emvura inoshandiswa kuona huwandu hwechinhu chakati mumuenzaniso. Chinhu chinofanira kuongororwa chinoshandurwa kuita chinhu chisinganyunguduke kuitira kuti chikwanise kuyerwa nemazvo.
3. Kugadzirwa kwemakemikari: Kudonha kwemvura kunowanzo shandiswa mukugadzirwa kwemakemikari kuchenesa zvinhu kana kuparadzanisa zvigadzirwa zvekupedzisira. Semuenzaniso, mukugadzirwa kwemamwe makemikari, kudonha kwemvura kunokonzerwa nemakemikari kunogona kunge kune hunhu hwakanaka hwemuviri kana hwemakemikari.
4. Kutora Mifananidzo Yemafirimu Echinyakare: Kare, maitiro ekunaya kwemvura aibatsira zvikuru mukutora mifananidzo yemafirimu. Semuenzaniso, mukugadzira ma emulsion emafirimu, makemikari asina kunyungudika e argentum halide akadai seAgBr aiumbwa kuburikidza nemaitiro ekunaya kwemvura.
Zvinhu Zvinokanganisa Maitiro Ekunaya Kwemvura
Zvimwe zvinhu zvinokanganisa maitiro ekunaya kwemvura zvinosanganisira:
1. Kuwanda kweMhindu: Sezvo kuwanda kwemaion anogadzirisa zvinhu kuchiwedzera, mukana wekuti chigadzirwa chakanyungudutswa chisvike pakukwana kwacho unowedzera, nokudaro zvichiwedzera mukana wekuti chiumbwe nekukurumidza.
2. Mhinduro pH: pH inogona kukanganisa kunyungudika kwezvinhu zvakasiyana-siyana. Semuenzaniso, pane mamwe ma pH values, mahydrogen ions anogona kuita zvinoenderana nemaanion anogadzirwa nemvura, zvichideredza kuwanda kwema free ions uye zvichikurudzira kunaya kwemvura.
3. Tembiricha: Mamwe macompounds anonyungudika zvakanyanya kana tembiricha yakakwira, nepo mamwe angasanyungudika zvakanyanya kana tembiricha yaderera. Nokudaro, mvura inogona kukanganiswa nekuchinja kwetembiricha.
4. Simba reIonic: Kuvapo kwemamwe maion mumushonga kunogona kukanganisa kuumbwa kwemvura inonaya kuburikidza nesimba reionic kana kuti salting out effect.
Mhedziso
Kuchinjana kwemvura kunokosha mumakemikari anoitika kana maion ari mu solution akabatana kuti agadzire makemikari ane kunyungudika kushoma. Kunzwisisa kushanduka uku kwakakosha mune zvakawanda zvesainzi netekinoroji. Zvinhu zvakasiyana-siyana zvakaita sehuwandu, pH, tembiricha, uye simba re ionic zvinogona kukanganisa maitiro ekunaya kwemvura. Mashandisirwo ekushanda kwe kushanduka uku anoita kuti kuve kwakakosha muminda yakaita sekurapa mvura, kuongorora makemikari, uye kugadzirwa kwemaindasitiri.
Nekunzwisisa kwakazara mashandiro uye zvinhu zvinopesvedzera maitiro ekunaya kwemvura, tinogona kushandisa maitiro aya kune zvinangwa zvakasiyana-siyana, kubva pakuchenesa nharaunda kusvika pakugadzira zvigadzirwa zvemakemikari zvakachena. Maitiro ekunaya kwemvura haasi chiitiko chinoitika murabhoritari chete, asiwo chimwe chatinogara tichishandisa muhupenyu hwedu hwezuva nezuva.
