Umehluko Phakathi Kwe-Potassium Hydroxide ne-Sodium Hydroxide

Emkhakheni wamakhemikhali, kokubili I-potassium hydroxide (KOH) kanye ISodium hydroxide (I-NaOH), eyaziwa ngokuthi i-caustic potash ne-caustic soda ngokulandelanayo, idlala indima ebalulekile. Ngaphandle kokwabelana ngokufana okuthile njengezisekelo eziqinile, banezici ezihlukile ezibenza bahluke ezicini ezihlukahlukene. Lesi sihloko sihlose ukunikeza umbono obanzi womehluko phakathi kwe-potassium hydroxide ne-sodium hydroxide.

Amakhemikhali namaPhysical Properties

Ukwakheka Kwemolekyuli kanye Nokwakheka

I-Potassium hydroxide iqukethe i-athomu eyodwa ye-potassium (K), i-athomu eyodwa ye-oxygen (O) kanye ne-athomu eyodwa ye-hydrogen (H), enefomula yamakhemikhali ethi KOH. I-sodium hydroxide, ngakolunye uhlangothi, yakhiwa i-athomu eyodwa ye-sodium (Na), i-athomu eyodwa ye-oxygen, ne-athomu eyodwa ye-hydrogen, evezwe njenge-NaOH. Umehluko ku-cation yensimbi (i-potassium vs. sodium) uyisisekelo futhi unomthelela ezintweni eziningi ezihlukene.

Ukubukeka ngokomzimba kanye nokuncibilika

Zombili lezi zinhlanganisela zimhlophe, izinto eziqinile ze-hygroscopic ezingeni lokushisa lasekamelweni, zimunca kalula umswakama ovela emoyeni. Nokho, babonisa umehluko ekuncibilikeni. I-Potassium hydroxide incibilika kakhulu emanzini, ikhulula inani elikhulu lokushisa ngesikhathi sokuchithwa, okungabangela isisombululo ukuthi sishise kakhulu. Iphinde inyibilike ku-ethanol ne-methanol. I-sodium hydroxide incibilika ngokulinganayo emanzini, ihambisana nokusabela okuphawulekayo kwe-exothermic. Kodwa uma kuqhathaniswa, i-potassium hydroxide ngokuvamile inokunyibilika okuphezulu kuzincibilikisi ezithile eziphilayo, okuyenza ibe ukukhetha okuthandwayo kwezinye izinqubo zamakhemikhali ezikhethekile.

Amaphuzu Ancibilikayo Nawabilisa

I-Potassium hydroxide inephuzu lokuncibilika cishe elingu-360 °C (680 °F) futhi ibilisa cishe ku-1.324 °C (2.415 °F). I-sodium hydroxide, ngokuphambene, inephuzu lokuncibilika elingaphezulu kancane elingu-318 °C (604 °F) futhi ibilisa ku-1.388 °C (2.530 °F). Lo mehluko ezindaweni zokuncibilika nokubilisa kungaba nomthelela ekusetshenzisweni kwazo ezinhlelweni zokushisa okuphezulu, ngayinye ikhethwa ngokusekelwe ezidingweni ezithile zokushisa zenqubo.

Izindlela Zokulungiselela

Ukukhiqizwa Kwezimboni zePotassium Hydroxide

Ngokwezimboni, i-potassium hydroxide ikhiqizwa ikakhulukazi nge-electrolysis ye-potassium chloride (KCl) izixazululo, inqubo eyaziwa ngokuthi inqubo ye-chloralkali. Ngale ndlela, amandla kagesi adluliselwa ngesisombululo se-potassium chloride esitokisini se-electrolytic. Ku-anode, ama-ion e-chloride afakwa i-oxidized ukuze akhe igesi ye-chlorine, kuyilapho ku-cathode, amanzi ancishiswa, akhiqize igesi ye-hydrogen nama-ion hydroxide. Ama-ion e-potassium ahlangana nama-ion e-hydroxide ukuze enze i-potassium hydroxide.

Ukukhiqizwa Kwezimboni ze-Sodium Hydroxide

I-sodium hydroxide nayo ikhiqizwa ngenqubo ye-chloralkali, kodwa kusetshenziswa i-sodium chloride (NaCl) njengento yokuqala. Ngokufanayo nokukhiqizwa kwe-potassium hydroxide, i-electrolysis yesisombululo se-sodium chloride iholela ekwakhekeni kwe-sodium hydroxide ku-cathode, kanye nokukhiqizwa kwegesi ye-chlorine ku-anode negesi ye-hydrogen ku-cathode. Umehluko omkhulu ekulungiseleleni usezintweni zokusetshenziswa ezisetshenziswayo, ngokukhiqizwa kwe-potassium hydroxide kuncike ku-potassium - equkethe usawoti kanye nokukhiqizwa kwe-sodium hydroxide ku-sodium - equkethe usawoti.

Izicelo

Kwezokukhiqiza Amakhemikhali

Ekukhiqizeni amakhemikhali, i-potassium hydroxide isetshenziswa kakhulu ekukhiqizeni amakhemikhali asekelwe ku-potassium njenge-potassium phosphates, okuwumanyolo obalulekile. Iphinde isetshenziswe ekuhlanganiseni ama-polymer athile nanjenge-catalyst kokunye ukusabela kwe-organic. I-sodium hydroxide, ngakolunye uhlangothi, iyisithako esiyinhloko ekukhiqizeni insipho nezinto zokuhlanza. Ngenqubo ebizwa ngokuthi i-saponification, ihlangana namafutha namafutha ukukhiqiza ama-molecule wensipho kanye ne-glycerol. Ukwengeza, isetshenziselwa ukukhiqizwa kwephepha, lapho isiza khona inqubo yokudonsa ukuze iphule i-lignin, ihlukanise imicu ye-cellulose yokukhiqiza iphepha.

Ku-Electroplating kanye ne-Metal Processing

I-Potassium hydroxide ithola ukusetshenziswa ezindaweni zokugeza ze-electroplating, ikakhulukazi ukunamathisela izinsimbi ezithile njenge-zinc. Amandla ayo okuncibilikisa ama-oxide ensimbi nokugcina indawo ene-alkaline inenzuzo ekuzuzeni ukunamathela kwensimbi okubushelelezi nokufana okufanayo. I-sodium hydroxide isetshenziselwa ukuhlanza insimbi kanye nezinqubo zokwelashwa kwendawo. Ingasusa amafutha, amafutha, nokugqwala ezindaweni zensimbi, izilungiselele ukucutshungulwa okwengeziwe njengokudweba noma ukucwenga.

Emikhiqizweni Yokudla Nezabathengi

I-Potassium hydroxide inomkhawulo kodwa ukusetshenziswa okuqondile embonini yokudla. Isibonelo, ingasetshenziswa ekukhiqizeni ukhokho ukulungisa i-pH, ithinte ukunambitheka nombala womkhiqizo wokugcina. Iphinde isetshenziswe ekukhiqizeni ama-pretzels athambile ukuze kwakheke ukuthungwa kwesici sokuhlafuna. I-sodium hydroxide, ngakolunye uhlangothi, isetshenziswa ekucubunguleni iminqumo ukuze isuse ukumunyu kwayo. Ibuye isetshenziselwe ukukhiqizwa kokunye ukudla - ama-thickeners webanga kanye nama-stabilizers.

Ukuphepha nokuphatha

Kokubili i-potassium hydroxide ne-sodium hydroxide yizinto ezonakalisa kakhulu. Zingabangela ukusha okukhulu esikhumbeni, emehlweni, nasendleleni yokuphefumula lapho zithintana. Lapho uphatha la makhemikhali, izinto zokuzivikela ezifanele (i-PPE) ezifana namagilavu, izibuko, namajazi elebhu kufanele kugqokwe. Uma uthinta isikhumba noma amehlo, ukugeleza ngokushesha futhi isikhathi eside ngamanzi amaningi kubalulekile. Kodwa-ke, ngenxa yomehluko ekusebenzeni kabusha kwawo kanye nokuncibilika, imvelo yezingozi ezingaba khona ingase ihluke kancane. Isibonelo, ukuncibilika okuphezulu kwe-potassium hydroxide kwezinye izincibilikisi kusho ukuthi ingasakazeka ngokushesha ezindaweni ezithile, okwandisa ingozi yokuchayeka ngengozi kwezinye izimo.

Sengiphetha, kuyilapho i-potassium hydroxide ne-sodium hydroxide behlanganyela isici esivamile sokuba izisekelo eziqinile, umehluko wabo kumakhemikhali nezakhiwo zomzimba, izindlela zokulungiselela, izinhlelo zokusebenza, nokucatshangelwa kokuphepha kubenza bafanelekele izinhloso ezihlukile. Ukuqonda lo mehluko kubalulekile kosokhemisi, onjiniyela, nabasebenzi bezimboni ukuthi basebenzise la makhemikhali ngempumelelo nangokuphepha ezinhlobonhlobo zezinhlelo zokusebenza.