stumbled upon the vital element. Carl Wilhelm Scheele, a Swede, made the initial discovery. However, Joseph Priestly, the man generally attributed with the discovery on the basis of his works being published first, discovered it in 1774. Neither of them quite understood it though, and only a French man by the name of Antoine Lavoisier who would be the first to fully understand it and disprove the old “phlogiston� notion (Priestly Joseph 4). Nonetheless, Carl Wilhelm Scheele was still the first to discover
However, another important scientist of that time, Carl Wilhelm Scheele, is less well-known due to his independence and unwillingness to publish. Even though Scheele did not receive enough credit for his work discovering elements, acids, and other compounds, countless scientists have benefitted from acquiring his knowledge. Carl Wilhelm Scheele was born in 1742 in a part of Germany under Swedish control. At fifteen,
•Classification: Non-metallic Chlorine: historical information Chlorine was discovered by Carl William Scheele at 1774 in Sweden. Origin of name: from the Greek word "chloros" meaning "pale green". Chlorine was discovered in 1774 by Carl Wilhelm Scheele. He obtained it through the reaction of the mineral pyrolusite (manganese dioxide, MnO2) with hydrochloric acid (HCl, then known as muriatic acid). Scheele thought the resulting gas contained oxygen. Sir Humphry Davy proposed and confirmed chlorine
or liquid form, oxygen is a pale blue color. Before Leonardo da Vinci suggested that the air was made up of two different gases, air was thought of as its own element. Joseph Priestley is usually the one credited for discovering oxygen but Carl Wilhelm Scheele also reported it. Sulfur on the other hand, has a yellow color and can come in many different forms. It is often used in rubber and gunpowder. Sulfur is also the tenth most abundant element in the universe. Because it is found in many other
Etymology The word chemistry comes from alchemy, which referred to an earlier set of practices that encompassed elements of chemistry, metallurgy, philosophy, astrology, astronomy, mysticism and medicine. It is often seen as linked to the quest to turn lead or another common starting material into gold,[6] though in ancient times the study encompassed many of the questions of modern chemistry being defined as the study of the composition of waters, movement, growth, embodying, disembodying, drawing
In order to better understand the concept of isomerism, it is good to begin at the root of the word itself. Isomerism can be broken down from ancient Greek language. In Greek, iso means “same”, while meros translates to “part.” From this, one can deduce that isomerism is a concept associated with similar parts. Essentially, isomerism in chemistry is defined as having two or more molecules containing the same number and kind of atoms, but differing in structure and/or function. Today, one can learn
The most widely used method for synthesizing citric acid was discovered by an American chemist named James Currie in 1917 in order to contend with the lack of citrus imports caused by the First World War. This method requires the fungus culture “Aspergillus niger”. This mould is fairly common in nature but special strains are used by the major citric acid producing companies to increase the fungus’s production of citric acid. This method involves substances that contain glucose such as simple
Abstract Over the years barium sulfate has proven to be a successful contrast agent for examination of the gastrointestinal tract. Though the road to discovery was long and relentless at times, when it finally found its niche in medicine it was only to the advantage of the physicians and patients today. There are many new diagnostic tools in radiology today that have led to the questioning of barium studies’ place in medicine and whether it will remain there long. And to what cost it will take to