Mibvunzo yeMienzaniso neKukurukurirana kweMasero eElectrolytic
Sero remagetsi mudziyo unoshandiswa kushandura simba remagetsi kuita reaction yemakemikari isingangoerekana yaitika, kusiyana nesero revoltaic kana sero regalvanic, iro rinoshandura simba remakemikari kuita simba remagetsi. Musero remagetsi, magetsi emagetsi anoshandiswa kumanikidza reaction yemakemikari iyo yaisazoitika pasina simba remagetsi rakawedzerwa. Pfungwa iyi yakakosha mumashandisirwo akasiyana-siyana emaindasitiri akadai sekugadzira simbi dzakachena, electrolysis yemvura kuti ibudise hydrogen neokisijeni, nezvimwe zvakawanda.
Chinyorwa chino chichakurukura mienzaniso yakati wandei yematambudziko emagetsi pamwe chete nehurukuro dzavo dzinogona kubatsira vadzidzi kunzwisisa pfungwa yemasero emagetsi zvakadzama.
Muenzaniso Mubvunzo 1: Electrolysis yeNaCl Solution
Mubvunzo
Mhinduro yesodium chloride (NaCl) inoiswa electrolys uchishandisa maerekitironi asina simba. Nyora maitiro anoitika pa cathode ne anode uye zvigadzirwa zvinoumbwa paerekitironi yega yega.
Kukurukurirana
Musero remagetsi, mune maerekitironi maviri: cathode (electrode isina kunaka) uye anode (electrode yakanaka). Kugadziriswa kweNaCl solution kunoitika muzvikamu zviviri: reaction pacathode uye reaction paanode.
1. Mhinduro paCathode:
Pa cathode, maion anobatanidzwa iNa^+ ions uye H_2O ions. Zvisinei, maion eH_2O anoderedzwa zviri nyore kupfuura maion eNa^+ nekuda kwekukwanisa kwawo kudzikisa kwakanyanya.
Maitiro anoitika pa cathode ndeaya:
``
2H₂O(l) + 2e⁻ → H₂(g) + 2OH⁻(aq) (Kugona kuderedza = -0.83 V)
``
Chigadzirwa chinogadzirwa pa cathode ihydrogen gas (H₂).
2. Maitiro paAnode:
Paanode, maion anobatanidzwa iCl⁻ ions uye H_2O ions. Cl⁻ ions dzinonyungudika zviri nyore kupfuura H_2O ions nekuda kwekusakwanisa kwadzo kunyungudika.
Maitiro anoitika pa anode ndeaya:
``
2Cl⁻(aq) → Cl₂(g) + 2e⁻ (Kugona kweOxidation = -1.36 V)
``
Chigadzirwa chinogadzirwa pa anode igesi yeklorini (Cl₂).
Saka, mukushandiswa kweNaCl solution electrolysis, chigadzirwa chinogadzirwa pa cathode ihydrogen gas (H₂) uye pa anode ichlorine gas (Cl₂).
Muenzaniso Mubvunzo 2: Electrolysis yeCuSO₄ Solution neCopper Electrodes
Mubvunzo
Kuongororwa kwe electrolysis ye copper(II) sulfate (CuSO₄) solution kwakaitwa uchishandisa copper electrodes. Nyora maitiro anoitika pa cathode ne anode uye zvigadzirwa zvinoumbwa pa electrode yega yega.
Kukurukurirana
Muchiitiko ichi, electrode haisi isina simba, asi electrode yemhangura, saka electrode ichaita chimwe chinhu.
1. Mhinduro paCathode:
Pa cathode, ma Cu²⁺ ions ari pa anode achaderedzwa.
``
Cu²⁺(aq) + 2e⁻ → Cu(s) (Kugona kuderedza = +0.34 V)
``
Chigadzirwa chinogadzirwa pa cathode imhangura yakasimba (Cu) iyo inoiswa pa electrode.
2. Maitiro paAnode:
Paanode, electrode yemhangura pachayo ichapiswa.
``
Cu(s) → Cu²⁺(aq) + 2e⁻ (Oxidation inogoneka = -0.34 V)
``
Chigadzirwa chinogadzirwa paanode iCu²⁺ ions.
Nekuti electrode yacho ndeyemhangura, ma Cu²⁺ ions akaiswa mu electrolys mumushonga anodzoserwa nekunyungudika kwemhangura pa electrode ye anode.
Muenzaniso 3: Huremu hwesimbi hwakaiswa
Mubvunzo
Musero remagetsi, 0.2 mol yemaerekitironi inoyerera nemumhinduro yeCuSO₄. Mangani magiramu emhangura anoiswa pa cathode?
Kukurukurirana
Huwandu hwemamorekuru emaerekitironi (F) anoyerera hunogona kushandiswa kuona huwandu hwemamorekuru esimbi akaiswa. Equation yaFaraday yekuisa simbi ndeiyi:
\[ n = \frac{Q}{Fz} \]
di mana:
– Q = huwandu hwemari (muCoulombs)
– F = Chimiro chaFaraday (96500 C/mol)
– z = huwandu hwemaerekitironi pa mole yega yega ye reaction.
Muchiitiko ichi, Cu²⁺ inotora maerekitironi maviri kuti ave Cu, saka z = 2.
Huwandu hwemamota emhangura akaiswa ndeinotevera:
\[ n = \frac{0.2 \text{ moles of electrons}}{2} = 0.1 \text{ moles of Cu} \]
Kurema kwemhangura yakaiswa:
\[ \text{mass of Cu} = n \times \text{Mr} \]
apo Mr ndiyo molar mass yeCu (63.5 g/mol)
Saka:
\[ \text{mass of Cu} = 0.1 \times 63.5 = 6.35 \text{grams} \]
Saka, 6.35 magiramu emhangura achaiswa pa cathode.
Muenzaniso Mubvunzo 4: Electrolysis yeKI Solution
Mubvunzo
Kuongororwa kweelectrolysis yeKI solution kunoitwa uchishandisa maerekitironi asina simba. Nyora maitiro anoitika pa cathode ne anode uye zvigadzirwa zvinogadzirwa paerekitironi yega yega.
Kukurukurirana
1. Mhinduro paCathode:
Pa cathode, ma ions anobatanidzwa i K⁺ ne H_2O ions. H_2O inoderedzwa zviri nyore kupfuura K⁺ ions.
``
2H₂O(l) + 2e⁻ → H₂(g) + 2OH⁻(aq)
``
Chigadzirwa chinogadzirwa pa cathode ihydrogen gas (H₂).
2. Maitiro paAnode:
Paanode, maion anobatanidzwa iI⁻ neH_2O ions. Maion eI⁻ anooxidized zviri nyore kupfuura maion eH_2O.
``
2I⁻(aq) → I₂(s) + 2e⁻
``
Chigadzirwa chinogadzirwa pa anode i iodine (I₂).
Saka, mu electrolysis yeKI solution, chigadzirwa chinogadzirwa pa cathode ihydrogen gas (H₂) uye pa anode iodine (I₂).
Penutup
Kunzwisisa kwakasimba misimboti uye mashandisirwo emasero emagetsi kwakakosha kune vadzidzi vekemesitiri nenyanzvi muminda yakaita sesimbi, kugadzirwa kwemakemikari, uye indasitiri yesimba. Chinyorwa chino chinoratidza mienzaniso yakati wandei yematambudziko emagetsi nemhinduro dzawo kuti zvibatsire kusimbisa kunzwisisa uku. Zvinotarisirwa kuti kuziva pfungwa idzi dzekutanga kuchabatsira kugadzirisa matambudziko akasiyana-siyana anoshanda uye edzidziso anosangana nawo munyika chaiyo.
