electrode potentials
- Created by: olivia johnson
- Created on: 01-05-13 14:40
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- electrode potentials
- standard electrode potential: the electrode potential of a half cell when measured against a standard hydrogen electrode.
- if this value is NEGATIVE the half cell DONATES ELECTRONS to the standord hydrogen electrode
- if this value is POSITIVE the half cell RECIEVES ELECTRONS from the standard hydrogen electrode
- in the standard hydrogen electrode, hydrogen gas is introduced at the top of the PLATINUM electrode and bubbles out of the bottom, through the ONE MOLAR solution of HYDROGEN IONS (h+)
- standard electrode potential: the electrode potential of a half cell when measured against a standard hydrogen electrode.
- if this value is NEGATIVE the half cell DONATES ELECTRONS to the standord hydrogen electrode
- if this value is POSITIVE the half cell RECIEVES ELECTRONS from the standard hydrogen electrode
- standard electrode potential: the electrode potential of a half cell when measured against a standard hydrogen electrode.
- the role of the platinum electrode
- ensures good contact between hydrogen gas and hydrogen ion soln
- allows reactions to occur quickly
- it is inert so does not take part in the reaction
- electrons move from positive to negative
- dont forget to balance electrons!
- if resulting voltage is POSITIVE, the reaction will occur, if the reaction is NEGATIVE, the reaction will not occur.
- increasing conc of substance on LEFT side of half equation will make the voltage MORE POSITIVE (less negative)
- increasing the conc of the substance on the RIGHT side of the ionic equation will make the voltage LESS POSITIVE (more negative)
- increasing the conc of the substance on the RIGHT side of the ionic equation will make the voltage LESS POSITIVE (more negative)
- standard electrode potential: the electrode potential of a half cell when measured against a standard hydrogen electrode.
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