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352877
Electrochemistry
Descrição
South Australian Certificate of Education (SACE) Physics (Electrochemistry) Mapa Mental sobre Electrochemistry, criado por Mika Goetze em 12-11-2013.
Sem etiquetas
electrochemistry
science
physics
electrochemistry
south australian certificate of education (sace)
Mapa Mental por
Mika Goetze
, atualizado more than 1 year ago
Mais
Menos
Criado por
Mika Goetze
aproximadamente 11 anos atrás
1209
2
0
Resumo de Recurso
Electrochemistry
Galvanic Cells
Anotações:
http://www.youtube.com/watch?v=C26pH8kC_Wk
Consist of two half cells
Electrode immersed in electrolyte
Through which ions move
Connected to each other by a wire
Through which electrons move
Each electrolyte is connected by a salt bridge
Through which ions move
Oxidation / Reduction
Oxidation
Occurs at Anode
Occurs at negative terminal
Reduction
Occurs at Cathode
Occurs at positive terminal
Galvanic Cell
Reactions
Anode
Zn -> Zn2+ + 2e-
Cathode
Cu2+ + 2e- -> Cu
Electrons travel through circuit in order to reach other half cell
The more reactive metal will always give electrons
The less reactive metal will always take electrons
Rechargeable Cells
Fuel Cells
How they work
Use Hydrogen and Oxygen
Split hydrogen electrons from protons
Then join them up on other side of curcuit
Produce only water
Positives
Produce no harmful waste products
Can theoretically go forever
Allow us to attain power in far off locations
Negatives
Very Expensive
Electrolytic Cells
Lead Car Battery
Recharge through electrolysis
Works like galvanic cell
Recharging
Lead Electrode: Pb2+ + 2e- → Pb
Lead Oxide Electrode: Pb2+ → Pb4+ + 2e-
Anexos de mídia
galvanic_cell (image/png)
pafcpem4 (image/jpg)
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