Contribution of a scientist: Henry-Louis Le Chatelier

 Henry-Louis Le Chatelier is a famous French chemist who was born in Paris, France in 1850. Le Chatlier is most well known for the creation of the « Le Chatelier » principle. Le Chatelier's Principle suggests that in a chemical system, equilibria tend to minimize changes imposed on their conditions. In simpler terms, the Le chatlier principle suggested that when a change of conditions occurs in a chemical reaction, such as a change in temperature, pressure or concentration, the reaction will find a way to oppose the change in an attempt to reach equilibrium. This principle is now commonly used today and is an effective way of predicting outcomes of reactions. Le Chatlier is also known for the numerous experiments he conducted on explosive materials. Through his experiments he was able to find ways of measuring high temperatures and led him to perfect his experiment where he coupled pure platinum with platinum-rhodium, this led to the thermoelectric pyrometer which is known as the “Le Chatlier”. He also perfected the oxyacetylene torch which is often used today for welding. Le Chatlier's numerous contributions to the field of science led him to become the president of the society from 1903 to 1904.