Electrochemical kucheneswa kwesirivha

Iyo "inoshamisa" yekuchenesa ndiro yesirivha inoshambadzirwa paterevhizheni uye mumapepanhau. Zvose zvaunoda kuita kuisa ndiro pasi pemudziyo, ugodira muupfu husinganzwisisike huchena, uzadze nemvura uye iwe unogona kuwana kushanda. Chokwadi, sirivha yakasvibiswa, yakaiswa mundiro, inopenya zvakare munguva pfupi. Zvisinei, makemikari anogona nyore kutsanangura nzira yekuita kweplate uye kunyange kuita analogue yayo, iyo ichabudirira kutsiva iyi inodhura mudziyo (iwe unofanirwa kubhadhara "zvishamiso"!).

Iwe unozoda ma reagents anowanikwa mukicheni yega yega - rock munyu uye aluminium foil yekurongedza chikafu (mufananidzo 1 mugalari pazasi). Dururira zvishoma mvura inopisa mugirazi (mufananidzo 2) uye udira munyu (mufananidzo 3). Dururirai mhinduro yakagadzirwa yeNaCl mubeaker yechipiri ine aruminiyamu foil yakapetwa kusvika pasi (Pic 4). Iye zvino nyura chipunu chesirivheri chakasvibiswa mumudziyo, icho chinobva chapenya muchikamu chiri pazasi pechiso chemhinduro (mufananidzo 5). Mushure memaminitsi angangoita gumi, bvisa teaspoon, ikozvino inopenya nekupenya kwesirivha (Pic 10). Mufananidzo 6 unoratidza chipunu pamberi uye mushure mekuedza - mutsauko uri pachena. Ndinofunga kuti munhu wose achabvuma kuti chemistry inogona kuita zvishamiso!

Mukuedza, galvanic cell inogadzirwa, umo anode iri simbi inoshanda - aluminium:

(-) Anode: Al⁰ → Al³⁺ + 3e^-

Pane sirivheri cathode, iyo yakasviba yakasviba sulfide yakaderedzwa:

(+) Cathode: Ag₂C + 2H₂O +2e^- → 2Ag⁰ + H₂C+ 2OH^-

Iyo yakazara equation yekucheneswa kwemagetsi esirivheri ndeyekutevera (aluminum inoumba inconspicuous white hydroxide precipitate, kunhuhwirira kusingafadzi kwehydrogen sulfide kunonzwika pamusoro pemhinduro):

2Al + 3Ag₂C + 6H₂O → 2Al(OH)₃ + 6Ag + 3H₂S

Electrochemical kucheneswa kwesirivha