Question

Its Urgent answer plz.. What is Cell potential and emf of cell? and what is electrode potential and standard electrode potential ​

Answer 1

Standard electrode potentials are a measurement of equilibrium potentials. The position of this equilibrium can change if you change some of the conditions (e.g. concentration, temperature). It is therefore important that standard conditions be used:

pressure = 101,3 kPa (1 atm)

temperature = 298 K (25 ℃)

concentration = 1 mol.dm−3