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- Half cells: difference between E (cell) = E (cathode}-E (anode) E . . .
2 When do I use each of the above? If I use one or the other they give me difference results For example, I'm trying to put the Volts into an equation to find standard free energy change $$\Delta G^\circ= -nFE$$ If I use the cathode minus anode I get a different answer to the oxide + reduct
- Positive or Negative Anode Cathode in Electrolytic Galvanic Cell
65 In a galvanic (voltaic) cell, the anode is considered negative and the cathode is considered positive This seems reasonable as the anode is the source of electrons and cathode is where the electrons flow However, in an electrolytic cell, the anode is taken to be positive while the cathode is now negative
- redox - Electrolysis of AgNo3 - Chemistry Stack Exchange
You would get silver at the cathode, and oxygen at the anode Since silver is below hydrogen in the spectrochemical series,it tends to get reduced over hydrogen, similarly, since $\ce {NO3-}$ is above $\ce {OH-}$ , it tends not to get oxidised, therefore giving oxygen
- Why do they use graphite electrodes in the Hall–Héroult process?
During the electrolysis process, aluminium is deposited at the cathode and oxygen is liberated at the anode Some of this oxygen reacts with the carbon in the graphite to form carbon-dioxide, thus slowly burning away the anodes Thus, the anodes have to replaced periodically But if this is the case, why do they use graphite anodes at all?
- Cathode + Anode + Rechargeable battery - Chemistry Stack Exchange
The cathode is a metal oxide and the anode consists of porous carbon During discharge, the ions flow from the anode to the cathode through the electrolyte and separator; charge reverses the direction and the ions flow from the cathode to the anode
- electrochemistry - Why does increasing electrolyte concentration . . .
In the limiting state, all ions arriving at the cathode due electro-migration, are immediately consumed by the reaction There is electrode adjacent electrolyte transition layer where cation concentration of bulk electrolyte starts to drop toward zero when approaching the electrode
- electrochemistry - Why is the standard electrode potential positive for . . .
As the electrons flow from the anode to the cathode (higher potential to lower potential), the cathode should possess a lower electrostatic potential than the anode That means that the electrode potential of a half cell when measured against the SHE should always be negative if the reaction is feasible, i e , electrons flow from SHE to the
- Hydrogen fuel cell - why do the H+ ions move through the electrolyte
My first question is this: why is the anode negative if it is attracting electrons? My second question refers to the fact that once the hydrogen atoms are iodised, the H+ ions move through the electrolyte towards the oxygen ions at the cathode, reacting to form water If the anode is negative, why would positive H+ ions move away from it?
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