Johannes Nicolaus Brønsted

You don't need to be Editor-In-Chief to add or edit content to WikiDoc. You can begin to add to or edit text on this WikiDoc page by clicking on the edit button at the top of this page. Next enter or edit the information that you would like to appear here. Once you are done editing, scroll down and click the Save page button at the bottom of the page.

Johannes Nicolaus Brønsted born in Varde (February 22, 1879 – December 17, 1947) was a Danish physical chemist.

He received a degree in chemical engineering in 1899 and his Ph. D. in 1908 from the University of Copenhagen. He was immediately appointed professor of inorganic and physical chemistry at Copenhagen.

In 1906 he published his first of many papers on electron affinity. In 1923 he introduced the protonic theory of acid-base reactions, simultaneously with the English chemist Thomas Martin Lowry. The same year, the electronic theory was proposed by Gilbert N. Lewis, but both theories are commonly used.

He became known as an authority on catalysis by acids and bases. He has the Brønsted catalysis equation named after him. He also came up with the highly used theory of the proton donor along with Lowry. Brønsted theorised that as a hydrogen atom (always found in an acid) is ionized once dissolved in water, it loses its electron and becomes a proton donor. The hydroxide ion, which occurs when an alkali is formed when a substance is dissolved in water is called a proton receiver. This leads to a neutralization reaction where the ions combine creating hydrogen hydroxide, otherwise known as water. The pH scale may be interpreted as "power of hydrogen", and the definition is based on the work of Brønsted and Lowry.

In World War II he opposed the Nazis, and in consequence he was elected to the Danish parliament in 1947, but could not take his seat because of illness. He died shortly after election.

Persondata
NAME	Brønsted, Johannes Nicolaus
ALTERNATIVE NAMES
SHORT DESCRIPTION	Danish physical chemist
DATE OF BIRTH	February 22 1879(1879-02-22)
PLACE OF BIRTH	Varde, Denmark
DATE OF DEATH	December 17 1947
PLACE OF DEATH	Copenhagen, Denmark

cs:Johannes Nicolaus Brønsted

da:Johannes Nicolaus Brønsted de:Johannes Nicolaus Brønstedfr:Joannes Bronsted nl:Johannes Nicolaus Brønsted ja:ヨハンス・ブレンステッド sk:Johannes Nicolaus Brønsted fi:Johannes Brønsted sv:Johannes Brønsted ta:ஜொஹான்ஸ் நிக்கொலஸ் பிரோன்ஸ்ட்டெட்

Template:Denmark-bio-stub