Electrochemical Cells

Electrochemical cells involve two half-cells: one where oxidation occurs and one where reduction occurs. When connected and placed in a circuit, these chemical reactions generate an electric potential (voltage) and a current.

Electrolysis

Electrolysis is a process by which electrical energy is used to convert compounds into their elements.

More amazing science.

Scientists are on a roll this year. 

First they created the perfectly optimised bit, then were able to observe an electron cloud and now this.

Scientists directly measure Van der Waals force.

Reactions of Potassium Permanganate

The reduction of KMnO₄ is different under acidic, alkaline and neutral conditions:

Here is a wonderful summary of the reactions of KMnO₄: