Electro-chemistry

The lead storage cell (a rechargeable cell) consists of electrodes of lead alloy grids; one electrode is packed with a spongy lead to form the…

The Leclanche dry cell, or zinc-carbon dry cell, is a voltaic cell with a zinc can as the anode and a graphite rod in the…

Rusting of iron consists of the formation of hydrated oxide. Look at the following two half equations: Fe2+ (aq) + 2e– → Fe(s)                       E° = -0.44…

Standard electrode potentials are useful in determining the strengths of any oxidising and reducing agents under standard-state conditions. – A reduction half-reaction has the general…

Standard reduction potential E° values can be used to predict whether a redox reaction will happen spontaneously or not. Find the standard reduction potential of…

Consider the zinc-copper cell, how can the emf of such a cell be calculated from the standard potentials, rather than by experiment? The two half-reactions…

The electrode potential is an intensive property whose value is independent of the amount of species in the reaction. Thus, the electrode potential for the…

A cell electromotive force (or “emf”) is a measure of the driving force of the electro-chemical cell reaction. The reaction at the anode has a…

We know that the charge of one electron is 1.60 x 10-19 C. Thus, the charge carried by one mole of electrons will be 6.02…

The amount of work done in moving an electrical charge through a conductor from a point of high electrical potential (or high electrical pressure) to…