Izixazululo nama-Colloids: Ukubheka Ngokujulile Izinto Ezimbili Ezithakazelisayo Zamakhemikhali
Kumakhemikhali, imiqondo emibili eyisisekelo evame ukuba yizihloko ezibalulekile ocwaningweni nasekusetshenzisweni okuhlukahlukene yizixazululo nama-colloid. Zombili zinezici ezihlukile kanye nezenzakalo ezibalulekile ezimweni ezahlukene zesayensi nezisebenzayo. Lesi sihloko sifuna ukujula ezixazululweni nama-colloid, sihlola umehluko wazo, izici, kanye nokusetshenziswa kwazo ekuphileni kwansuku zonke.
1. Ukuqonda Izixazululo Nama-Colloids
Isixazululo siyingxube efanayo equkethe izinto ezimbili noma ngaphezulu esigabeni esisodwa. Esixazululweni, i-solute iqukethe ama-molecule ahlakazeke ngokulinganayo ku-solvent. Isibonelo esivamile sesisombululo amanzi kashukela, lapho ushukela uncibilika emanzini ukuze wakhe ingxube efanayo. Izixazululo zihlukaniswa ngokusekelwe ezigabeni ze-solvent kanye ne-solute, njenge-gas-in-gas, i-liquid-in-liquid, kanye ne-solid-in-liquid solutions.
Ngakolunye uhlangothi, ama-colloid ayingxube ehlukahlukene lapho izinhlayiya ezinobukhulu obusukela kuma-nanometer angu-1 kuya kwangu-1000 zihlakazeka endaweni yokuhlakazeka. Ama-colloid abonakala efana emehlweni, kodwa ahlukile uma ebhekwa ngaphansi kwe-microscope. Izibonelo ezivamile zama-colloid ubisi (emulsion), intuthu (i-aerosol), kanye ne-jelly (ijeli).
2. Isakhiwo kanye Nezakhiwo Zezixazululo
Isixazululo uhlelo lapho i-solute ihlakazeka ngokulinganayo ngobukhulu bezinhlayiya ezingeni lama-molecule noma le-ionic, okwenza kube nzima ukuhlukanisa ngokubuka okubonakalayo noma okubonakalayo. Ezinye zezimpawu eziyinhloko zezixazululo zifaka:
– Ukuncibilika: Lokhu kuyikhono lento yokuncibilika ku-solvent ethile. Izici ezithinta ukuncibilika zifaka phakathi izinga lokushisa, ingcindezi, kanye nezakhiwo zamakhemikhali ze-solvent kanye ne-solvent.
– Ukuhlushwa: Inani le-solute esixazululweni lingabonakaliswa ngamayunithi ahlukahlukene, njenge-molarity (M), i-molality (m), kanye ne-mole fraction. I-Molarity, isibonelo, inani lama-moles e-solute ngelitha lesisombululo.
– Izakhiwo Ezihambisanayo: Izakhiwo zezixazululo ezifana nokucindezeleka kwamaphuzu okuqandisa, ukuphakama kwamaphuzu okubila, ingcindezi ye-osmotic, kanye nokucindezeleka komfutho womhwamuko yizakhiwo ezincike ekugxileni kwezinhlayiya ezincibilikisiwe, hhayi ubunikazi bazo.
3. Isakhiwo kanye Nezakhiwo Zama-Colloids
Izinhlayiya ze-Colloidal zikhulu kunama-molecule, kodwa zincane ngokwanele ukuba zihlale zilenga futhi zingahlali ngenxa yethonya lamandla adonsela phansi. Izakhiwo ze-colloidal zifaka:
– Umphumela we-Tyndall: Leli yikhono lama-colloid lokusabalalisa ukukhanya. Uma kuqhathaniswa nezixazululo, ama-colloid ayakwazi kakhulu ukwenza imisebe yokukhanya ibonakale lapho edlula ezinhlayiyeni zawo ezihlakazekile. Isibonelo esivamile ukukhanya kwezibani zemoto enkungwini.
– Ukunyakaza kwe-Brownian: Izinhlayiya ze-Colloidal zihamba ngokungahleliwe ngenxa yokushayisana nama-molecule e-dispersion medium. Lokhu kwandisa ukuzinza kwe-colloid ngokumelene nemvula.
– Ukumuncwa: Izinhlayiya ze-Colloidal zivame ukuheha futhi zigcine ama-molecule noma ama-ion ebusweni bazo ngenqubo yokumuncwa, okungathinta ukushaja kobuso kanye nokuqina kwe-colloid.
4. Umehluko Omkhulu Phakathi Kwezixazululo Nama-Colloids
Nakuba izixazululo nama-colloid zibonakala zifana ngezindlela eziningi, zinemehluko omkhulu obalulekile:
– Usayizi Wezinhlayiya: Izinhlayiya ezixazululweni zisezingeni lama-molecule noma lama-ion, kuyilapho izinhlayiya ezikuma-colloid zinkulu, ziphakathi kuka-1-1000 nm.
– Ukulingana: Izixazululo ziyafana ngokuphelele ezingeni lama-molecule, kanti ama-colloid abonakala efana kodwa ahlukene ezingeni lama-microscopic.
– Ukuzinza: Izixazululo ngokuvamile zizinzile futhi azibonisi imvula yezinhlayiya ngokuhamba kwesikhathi, kanti ama-colloid avame ukuba nokuqina okuthonywa yi-particle charge kanye nohlobo oluphakathi.
5. Izicelo Empilweni Yansuku Zonke
Ukuqonda izixazululo nama-colloid kubalulekile ngoba anezinhlelo eziningi ezisebenzayo empilweni yansuku zonke. Nazi ezinye izinhlelo zokusebenza ezivamile:
– Imithi: Imithi eminingi yenziwe ngendlela yesisombululo ukuze kube lula ukumuncwa nokusebenza kahle, njenge-cough syrups. Imithi ivame futhi ukuba ngendlela ye-colloidal, njengokhilimu namafutha okugcoba, okuvumela isithako esisebenzayo ukuthi sisabalale phezu kwesikhumba.
– Imboni Yokudla: Izixazululo ezifana namajusi neziphuzo ezidakayo ziyingxenye ebalulekile yokudla kwabantu. Ama-Colloid atholakala nasemikhiqizweni eminingi, njengebhotela, i-margarine, i-ayisikhilimu, kanye ne-mayonnaise.
– Ukwelashwa Kwamanzi: Izinqubo ezinjengokujiya kanye nokugoba zisebenzisa izakhiwo ze-colloidal ukuze kususwe ukungcola emanzini ukuze kususwe kalula.
– Izimonyo: Imikhiqizo yezimonyo efana nama-lotion, okhilimu, nama-gel ivame ukuba yi-colloidal. Lokhu kuvumela izithako ezisebenzayo ukuthi zisatshalaliswe ngokulinganayo esikhumbeni.
– Isayensi Yezinto Ezisetshenziswayo: Izinto eziningi ezihlanganisiwe zenziwa ngokusebenzisa izakhiwo zama-colloid, isibonelo amathayi erabha asebenzisa izinhlayiya ze-carbon colloidal ukuqinisa isakhiwo sawo somzimba.
6. Izifundo Eziqhubekayo Nocwaningo
Izwe le-chemistry liyaqhubeka nokuguquka, futhi ngalo, ukuqonda kwethu izixazululo nama-colloid kuyajula. Ucwaningo lwakamuva lungafaka phakathi ukutadisha ukuthi izinhlayiya ze-colloidal zihlangana kanjani emithonjeni eyinkimbinkimbi kakhulu, noma ukuthi izakhiwo ze-colligative zezixazululo zingashintshwa kanjani ukuze zisetshenziswe ezimbonini.
Ku-nanotechnology, isibonelo, ama-colloid adlala indima ebalulekile ekuthuthukisweni kwezinto ezintsha ezinezakhiwo ezihlelwe esikalini se-nanometer, evula umnyango wezinto ezintsha ku-electronics, kwezokwelapha kanye namandla.
Isiphetho
Zombili izixazululo nama-colloid ziyizinto eziyisisekelo zamakhemikhali ezinokusetshenziswa okubanzi empilweni yansuku zonke. Ukuqonda umehluko, izakhiwo, kanye nezakhiwo ezihlukile zalezi zinhlelo ezimbili akugcini nje ngokuthuthukisa ulwazi oluyisisekelo lwe-chemistry kodwa futhi kunikeza ukuqonda okusebenzayo ezimbonini eziningi. Ulwazi lwezixazululo nama-colloid luyisihluthulelo sezinto ezintsha zesikhathi esizayo kanye nentuthuko yezobuchwepheshe.
