Carl Wilhelm Scheele

Carl was a man who loved science.

He worked in a shop for medicine. He studied how things change. He found that air is a mix of two things. One part is the air we breathe.

He also found many new parts of the world. He found things like barium and chlorine. He found parts of food too. These were in things like lemons.

Carl worked hard even without fancy tools. He learned a lot by doing tests. His work helped us learn about our world.

He was a great scientist.

Carl Wilhelm Scheele was a famous chemist. He lived in the 1700s. He learned about science while working in medicine shops. He often worked late into the night.

Scheele discovered many new parts of our world. These parts are called elements. He found elements like barium and chlorine.

He also found several acids. These are found in things like lemons and milk.

One of his biggest finds was oxygen. At that time, people believed in a theory called phlogiston. They thought fire was a thing that left objects when they burned. Scheele did not know this was wrong. He called oxygen "fire air" because it helped things burn. He found it by heating different materials.

He was a very hard worker. He did not have expensive tools. He still made many great discoveries. Some people call him "hard-luck Scheele." This is because other scientists published their work first. Even so, his work was very important. He helped make chemistry a real science.

Carl Wilhelm Scheele was a very important chemist from the 1700s. He was born in a place called Stralsund in 1742. His father was a grain dealer and a brewer. Because of his family, Carl learned how to read medical notes very early. At only fourteen years old, he became an apprentice in a medicine shop.

He spent many years working in different shops across Sweden. He often worked late into the night to study. This hard work helped him learn how the world works.

Scheele found many new things by using heat on different materials. He would take substances like silver carbonate or manganese dioxide and heat them up.

This process released different gases for him to study. By doing this, he discovered oxygen, which he called "fire air." He also found the element chlorine by treating a mineral called pyrolusite with acid.

He even found several acids that we use today. These include citric acid from lemons and lactic acid from milk. He was a master at seeing what happened during these chemical changes.

In the 1770s, most scientists believed in a theory called phlogiston. They thought phlogiston was a "matter of fire" inside things. They believed it left an object when it burned. Scheele did not realize this theory was actually wrong. He thought his "fire air" combined with phlogiston to make heat or light. Even though his ideas about phlogiston were incorrect, his experiments were very helpful. He helped scientists move away from old ideas and toward real chemistry.

Scheele was a very busy scientist who made many specific discoveries. He identified elements like barium in 1772 and molybdenum in 1778. He also found tungsten in 1781 and chlorine. He was elected to the Royal Swedish Academy of Sciences in 1775. He was a very successful apothecary, which is a type of pharmacist. He even found a way to make phosphorus in large amounts. This helped Sweden become a top maker of matches. He achieved all of this without very expensive laboratory tools.

Many people remember Scheele as "hard-luck Scheele." This is because other scientists often published their work before him. For example, Joseph Priestley and Antoine Lavoisier published findings about oxygen first. Even though he was sometimes slower to publish, his work was still vital. He helped turn chemistry into a standardized science with set rules. His many papers changed how we understand the building blocks of nature. Today, we still study the elements and acids he first found.

Carl Wilhelm Scheele was a highly productive German-Swedish pharmaceutical chemist. He lived from 1742 to 1786 and made many vital discoveries in chemistry. Scheele identified several chemical elements and various organic acids. His work helped transform chemistry into a standardized scientific field. Even though he lacked expensive laboratory equipment, his results were astonishing. He is often remembered for his deep curiosity and his relentless experimental work.

Scheele's scientific journey began with an early apprenticeship. At age fourteen, he moved to Gothenburg to work as an apprentice pharmacist. He spent eight years learning the trade under Martin Andreas Bauch. During this time, he studied the works of many different thinkers. He often performed experiments late into the night. Later, he worked in Malmö and eventually in Stockholm. In 1770, he became the laboratory director at a pharmacy in Uppsala. This role allowed him to supply chemicals to the chemist Torbern Bergman. Their friendship led to significant scientific breakthroughs through shared laboratory use.

One of Scheele's most famous achievements was the discovery of oxygen. He did not call it oxygen, but instead named it "fire air." This name came from his belief that the gas supported combustion. At the time, most scientists followed the phlogiston theory. This theory claimed that phlogiston was a "matter of fire" released during burning. Scheele believed his fire air combined with phlogiston to create light or heat. He discovered this gas by heating substances like mercuric oxide and silver carbonate. He also isolated it by heating magnesium nitrate and other nitrate salts.

Scheele's discovery of oxygen was part of a larger study of air. Before his work, scientists thought air was a single, unchanging element. Scheele's experiments proved that air was actually a mixture of different gases. He identified two main parts: "fire air" and "foul air." He estimated that fire air made up about one quarter of the air. Although he used the language of phlogiston, his findings were essential. His work helped scientists eventually abandon the incorrect phlogiston theory. This shift changed how the world understood chemical reactions and gases.

Beyond oxygen, Scheele identified many other chemical elements. In 1772, he discovered the element barium. He later identified molybdenum in 1778 and tungsten in 1781. He also made a major discovery regarding the element chlorine. By treating a mineral called pyrolusite with hydrochloric acid, he produced a yellow-green gas.

This gas was chlorine, which he identified through his careful observations. He also recognized the presence of manganese in pyrolusite, even if he could not isolate it at first. These discoveries expanded the known map of the natural world.

Scheele was also a master of organic chemistry. He identified several important organic acids used in science and industry. These included tartaric acid, oxalic acid, uric acid, lactic acid, and citric acid. He also discovered hydrofluoric, hydrocyanic, and arsenic acids.

His ability to isolate these substances was quite remarkable. He even developed a process for mass-producing phosphorus. This achievement helped Sweden become a leading global producer of matches. His work bridged the gap between simple pharmacy and complex chemical science.

Despite his brilliance, Scheele faced a difficult path regarding credit for his work. He is sometimes called "hard-luck Scheele." This nickname exists because he often discovered things before others, but published later. For example, Joseph Priestley and Antoine Lavoisier published findings on oxygen before Scheele's 1777 publication. Because of these timing issues, others were often credited with his discoveries. However, modern science recognizes the immense value of his detailed laboratory notebooks. His research provided the groundwork for the standardized procedures used by chemists today.

Scheele's life connects the era of early pharmacy to the era of modern chemistry. He moved from reading simple prescriptions to analyzing the very building blocks of matter. His work with acids and gases helped define the chemical properties of many substances. By identifying elements like barium and manganese, he contributed to the periodic understanding of nature. His legacy lives on in every laboratory that uses organized, repeatable experiments. He proved that careful observation can reveal the hidden secrets of the physical world.