Johann Wilhelm Ritter Discovered Ultraviolet Light | Invented Dry Cell Battery

Johann Wilhelm Ritter – discoverer of ultraviolet light

Category : Personalities
Published by : Data Research Analyst, Worldofchemicals.com

Biography & Contributions

Johann Wilhelm Ritter was a German chemist, physicist and philosopher born in December 16, 1776 in Samitz, Silesia – died on January 23, 1810. Ritter discovered the ultraviolet region of the spectrum.

Ritter's first scientific researches concerned galvanic phenomena. He noticed that silver chloride was transformed faster from white to black when it was placed at the dark region of the Sun's spectrum, close to its violet end. Ritter duplicated the experiment but arranged the electrodes so that he could collect the two gases separately and thereafter he discovered the process of electroplating.

Ritter was the first to establish an explicit connection between galvanism and chemical reactivity. He has done many inventions and developments like built the first electrochemical cell, invented the dry cell battery, developed a storage battery. Ritter correlated the electrical effects produced by various metal couples on the muscle with differences in the metals’ ease of oxidation.

Silver Chloride

Silver Chloride occurs naturally as a mineral chlorargyrite and it is a white crystalline solid. It dissolves in solutions containing ligands such as chloride, cyanide, triphenylphosphine, thiosulfate, thiocyanate and ammonia.

Silver chloride has been used as an antidote for mercury poisoning, assisting in the elimination of mercury, to make photographic paper since it reacts with photons to form latent image and via photo reduction, in photo chromic lenses.

Electrochemical cell

Electrochemical cell is a device capable of either generating electrical energy from chemical reactions or facilitating chemical reactions through the introduction of electrical energy. The chemical reactions in the cell may involve the electrolyte, the electrodes, or an external substance. An electrochemical cell consists of two half-cells. Each half-cell consists of an electrode and an electrolyte. As electrons flow from one half-cell to the other through an external circuit, a difference in charge is established. If no ionic contact were provided, this charge difference would quickly prevent the further flow of electrons. A salt bridge allows the flow of negative or positive ions to maintain a steady-state charge distribution between the oxidation and reduction vessels, while keeping the contents otherwise separate.

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