Electrochemistry Flashcards
how is electrolytic cell made
apply potential difference greater than cell potential
how does electrochemical cells work
the gibbs energy of the rection is used up as elctrical work
which electrode undergoes oxidation
anode(-ve) the electrode dissolves into the electrolyte
electrode potential
potential difference between electrode and electrolyte
standard electrode potential
when concentration of all species involved is unity
which electrode is SHE
Anode
+ve electrode potential
the metal is more stable when reduced (more stable when H+ is reduced
Pt undergoes oxidation
false (inert)
use of electrochemical cell
to find ph,solubility product,thermodynamic and potentiometric titration
what is E at equilibrium
0
what is si units of ohm
kgm2/S3A2
SI UNIT OF CONDUCTANCE
S
conductivty si unit
Sm-1
electrical conductance
metaliic
depends on temp,no of valence,nature
electrolytic conductance
thorugh ions
depends on yemp,nature of electrolyte,solvent,and viscosiyt,conc of electrolyte,size of ions
what is cell constant
l/A
conductivity differs due to
charge and size
unit of molar conductivity
Sm2mol-1
strong electolyte graph for conductivity
l=l-A(c)^1/2
what does A depend on
type of electrolyte (all electrolyte of particular type have same A)
why does conductivity change for weak electrolyte
because of increase in degree of dissociation
degree of dissociation
conductivity/molar conductivity
