87.8 Electrode potential 7.8.5. liquid junction potential and salt bridge (I)liquid junction potential KCI HCI KCI H The diffusion of ions is irreversible, which The value of E; can reach ca 30 mV, which destroys the reversibility of the cell is too large for the measurement of emf.7.8.5. liquid junction potential and salt bridge (1) liquid junction potential The diffusion of ions is irreversible, which destroys the reversibility of the cell. The value of Ej can reach ca. 30 mV, which is too large for the measurement of emf. §7.8 Electrode potential