redox potnetials Flashcards
what does redox potential tell us
the ability of ion to be oxidised or reduced
what do we know about redox potential
nopr, negative is better at being oxidised and positive a better at being reduced
describe the negative potential
releases the electrons the best
best at being oxidised
best as a reducing agent
deascribe the positive electrode potential
accepts the electron the best , oxidising agent so gets reduced
how to measure in standard conditions
using aqueous reactant at a concentration of 1mol/dm3 and measure against a standard hydrogen potential electrode, against standard conditions
whay are redox potential not always the same as standard electrode potential
it varies according to the environment such as ph and the ligands attached
how does ph affect electrode potential
some metal ions require h+ ions when it is reduced and others require oh-
how does ligands affect the electrode potential
it will affect the bond strength to the central atom and its ability to donate or accept electron
what happens when the potential becomes more positive in acidic conditions
the equilibrium shifts to the right, increasing the ability to accept electrons and increasing ability to get reduced
why is metal silver not a transition metal
it does not form variable oxidation state so doesn’t form colored compunds
why cant it ofrm colored compounds
it has a full 4d orbital so not partially filled and there is no enrgy levels that electron can transition between so cannot absorb visible light
however what can silver do
form complex ions, can act as a catalyst
