March 11, 1864, Cato M. Guldberg and Peter Waage enacted the Law of Mass Action.

On this day (March 11), 1864, Cato M. Guldberg and Peter Waage enunciated the Law of Mass Action.
Cato Maximilian Guldberg was born in Norway on August 11, 1836 and was a mathematician and chemist.
Peter Waage was born in Norway on June 29, 1833 and was a chemist. In his second marriage he married a sister of Cato Maximilian Gulberg
The two were professors at the University of Oslo and, based on some works by Claude Berthollet (1748) and their own experiments, they enunciated one of the fundamental laws of Chemistry; the Law of Mass Action.
The law of masses or law of mass action states that for a reversible chemical reaction, in equilibrium at a constant temperature, there must be a constant relationship between concentrations of reactants and products.
The work of Gulberg and Waage was published only in Norwegian and, possibly for this reason, went unnoticed by the scientific world.
In 1875, Wilhem Ostwald (born 1853 and Nobel Prize Winner in Chemistry in 1909) rediscovered it.
In 1877, it was deduced theoretically, from the principles of thermodynamics, by Jacobus van't Hoff (born in 1852 and first Nobel Prize winner in Chemistry in 1901), which recognized the priority of Guldberg and Waage.
How curious to comment that Peter Waage years later would dedicate himself more to applied science within Nutrition and came to make discoveries such as methods of conservation of milk, as well as mechanisms for creation of evaporated milk and condensed milk without the need to use sugar.
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- what a face! What's wrong with you?
- well, this weekend we have a family reunion
- wow, and do you have any annoying brother-in-law?
- two! two heavy brothers-in-law!
- two?!
- well there will be many discussions
- no, if they get along great
- oh yeah?
- yes, and they spend the whole meeting talking about chemistry
- chemistry?
- yes, yes, the Law of Mass Action... yes, we have to review the resulting experiments...
- Are your brothers-in-law Guldberg and Waage?
- lucky you!
- any luck?
- they are eminent chemists!
- if I don't say no, but if you want you can put up with them at the family meal
- no, no, it's the same
- it seemed to me

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