YElectrolytic vs Galvanic Cells
Electrolytic thiab galvanic hlwb yog ob hom electrochemical hlwb. Hauv ob qho tib si electrolytic thiab galvanic hlwb, oxidation-txo cov tshuaj tiv thaiv tau tshwm sim. Hauv ib lub cell, muaj ob lub electrodes hu ua anode thiab cathode. Cov tshuaj tiv thaiv oxidation tshwm sim ntawm qhov anode, thiab qhov txo qis tshwm sim tshwm sim ntawm cathode. Electrodes yog immersed nyob rau hauv cais electrolyte daws. Feem ntau, cov kev daws teeb meem no yog cov kev daws teeb meem ionic ntsig txog hom electrode. Piv txwv li, tooj liab electrodes yog immersed nyob rau hauv tooj liab sulfate tov thiab nyiaj electrodes yog immersed nyob rau hauv silver chloride tov. Cov kev daws teeb meem no txawv; yog li ntawd, lawv yuav tsum sib cais. Txoj kev uas feem ntau cais lawv yog tus choj ntsev.
Electrolytic Cell yog dab tsi?
Qhov no yog lub xovtooj ntawm tes uas siv cov hluav taws xob tam sim no los rhuav tshem cov tshuaj lom neeg, lossis ua lwm yam lus, ua electrolysis. Yog li electrolytic hlwb xav tau ib qho chaw sab nraud ntawm hluav taws xob rau kev ua haujlwm. Piv txwv li, yog tias peb coj tooj liab thiab nyiaj los ua ob lub electrodes hauv lub xov tooj ntawm tes, nyiaj yog txuas nrog lub davhlau ya nyob twg zoo ntawm lub zog sab nraud (lub roj teeb). Tooj liab txuas nrog rau lub davhlau ya nyob twg tsis zoo. Txij li thaum lub davhlau ya nyob twg tsis zoo yog electron nplua nuj, electrons ntws los ntawm lub davhlau ya nyob twg mus rau tooj liab electrode. Yog li ntawd tooj liab txo. Ntawm cov nyiaj electrode, cov tshuaj tiv thaiv oxidation tshwm sim, thiab cov hluav taws xob tso tawm tau muab rau lub tshuab hluav taws xob tsis zoo ntawm lub roj teeb. Hauv qab no yog tag nrho cov tshuaj tiv thaiv nyob rau hauv ib tug electrolytic cell uas muaj tooj liab thiab nyiaj electrodes.
2Ag(s) + Cu2+(aq)⇌ 2 Ag+(aq) + Cu(s)
Galvanic cell yog dab tsi?
Galvanic lossis voltaic cells khaws cov hluav taws xob hluav taws xob. Cov roj teeb yog tsim los ntawm cov kab hluav taws xob galvanic los tsim cov hluav taws xob ntau dua. Cov tshuaj tiv thaiv ntawm ob lub electrodes hauv galvanic cell zoo li mus spontaneously. Thaum qhov kev tshwm sim tshwm sim, muaj qhov ntws ntawm electrons los ntawm anode mus rau cathode ntawm tus neeg xyuas pib sab nraud. Piv txwv li, yog hais tias ob lub electrodes yog nyiaj thiab tooj liab nyob rau hauv ib tug Galvanic cell, cov nyiaj electrode yog zoo nrog rau cov tooj liab electrode. Cov tooj liab electrode yog lub anode, thiab nws dhau oxidation cov tshuaj tiv thaiv thiab tso tawm electrons. Cov electrons no mus rau cov nyiaj cathode ntawm sab nraud Circuit Court. Li no, silver cathode undergoes txo cov tshuaj tiv thaiv. Lub peev xwm sib txawv yog tsim los ntawm ob lub electrodes uas tso cai rau cov electron ntws. Hauv qab no yog cov tshuaj tiv thaiv kab mob ntawm cov kab mob Galvanic saum toj no.
2 Ag+(aq)+ Cu(s)⇌ 2Ag(s) + Cu2+(aq)
Qhov txawv ntawm Electrolytic cell thiab Galvanic cell yog dab tsi?
• Electrolytic cells xav tau lub zog hluav taws xob sab nraud rau kev ua haujlwm, tab sis Galvanic hlwb ua haujlwm tsis tu ncua thiab muab hluav taws xob tawm.
• Nyob rau hauv ib lub cell electrolytic, cov kev taw qhia ntawm tam sim no yog opposite ntawm cov galvanic hlwb.
• Cov tshuaj tiv thaiv hauv electrodes yog thim rov qab hauv ob hom hlwb. Uas yog nyob rau hauv ib tug electrolytic cell cov nyiaj electrode yog lub anode, thiab tooj liab electrode yog cathode. Txawm li cas los xij, hauv Galvanic hlwb, tooj liab electrode yog anode, thiab nyiaj electrode yog cathode.
• Hauv ib lub xovtooj ntawm electrochemical, lub cathode yog qhov zoo, thiab anode tsis zoo. Hauv ib lub cell electrolytic, lub cathode tsis zoo, thiab anode yog qhov zoo.
• Rau kev ua haujlwm ntawm cov hlwb electrolytic, yuav tsum muaj qhov hluav taws xob ntau dua li Galvanic cells.
