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Notes On Gaseous State (BSc and Integrated Standard For all Concerned Entrance Examination)

 Notes On Gaseous State      This page provides you all details about the gaseous state of BSc standard. Concerned problems will be solved at the end of each concept. Continue till the end to find the easiest explanation of every concept you need in this regard . Postulates of Kinetic Theory of Gases: 1. All gas consist of a very large number of minute particles, called molecules.  2. The gas molecules are extremely small in size and are separated by large distance. The actual volume of the gas molecules is thus negligible as compared to the total volume occupied by the gas.  3. The pressure exerted by the gas is due to the bombardment of the molecules on the walls of the vessel.  4. The gas molecules collide with one another and also with the walls of the vessels. These collisions are perfectly elastic and there is no loss of energy during these collisions.  5. The distance between the gas molecules are very large. Thus, there is no effective force of attraction or r

Chemistry Lab accidents - How severe it can be !

Chemists who degraded or lost their lives due to laboratory accidents – Lessons from the Lab

In a chemical laboratory, exercising caution is of paramount importance to ensure both personal and collective safety and the integrity of experiments. While it's natural to approach the laboratory environment with a degree of respect and mindfulness, there's no need to let fear dominate our actions. Carelessness in a chemical laboratory can have grave consequences, ranging from mild accidents to life-threatening situations. Mishandling chemicals, not following proper procedures, or neglecting safety protocols can lead to chemical spills, fires, toxic fume releases, and explosions. These hazards can cause serious injuries or even loss of life. Many of eminent chemists like Marie Curie, Jean-Pierre Levaray, Albert Alexander lost their life to laboratory mishaps. You can find below, a list of chemists who lost their lives to laboratory mishaps. Also find what caused the mishaps!

Marie Curie (1867-1934) died as a result of complications related to her long-term exposure to radiation. Marie Curie was a pioneering physicist and chemist who conducted groundbreaking research on radioactivity. She discovered the elements polonium and radium, and her work laid the foundation for many advancements in the field of nuclear physics and medical treatments.

Throughout her research, Marie Curie worked extensively with radioactive materials, including handling large quantities of radium without the knowledge of the potential health risks associated with radiation exposure. At the time, the dangers of radiation were not fully understood, and safety protocols were not as rigorous as they are today.

As a result of her prolonged exposure to high levels of radiation, Marie Curie suffered from various health issues, including chronic radiation sickness. She developed aplastic anemia, a condition in which the bone marrow fails to produce enough blood cells, leading to a weakened immune system and other complications. Despite her declining health, she continued her scientific work and advocacy efforts.

Marie Curie passed away on July 4, 1934, in Sancellemoz, France, at the age of 66. Her contributions to science and her pioneering work in radioactivity have had a profound and lasting impact on various fields, even though the risks associated with radiation exposure that she faced serve as a reminder of the importance of safety in scientific research.

Find safety instructions in a very common chemical laboratory.

Karen Wetterhahn (1948-1997): Karen Wetterhahn, a chemistry professor at Dartmouth College, died from mercury poisoning after a few drops of dimethylmercury, a highly toxic compound, came into contact with her gloved hand during a laboratory experiment.

Jean-Pierre Levaray (1953-1984): Jean-Pierre Levaray, a French chemist, died after being exposed to a highly toxic chemical called sodium azide while working on an experiment. Sodium azide is known to decompose into toxic nitrogen gas. Find Jean-Pierre (right in the figure below)

By Jean-Pierre Levy, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=52489600
Valerian Bykovsky (1928-1960): Valerian Bykovsky, a Soviet chemist, died from exposure to phosgene gas, a toxic chemical used as a chemical warfare agent in World War I. He inhaled the gas while conducting experiments.

Anatoli G. Zheleznyakov (1921-1963): Anatoli Zheleznyakov, a Soviet scientist, died due to his exposure to high concentrations of dimethyl sulfate, a highly toxic and reactive chemical. The exposure led to severe chemical burns and organ damage.

Louis Slotin (1910-1946): While not a chemist by training, Louis Slotin was a Canadian physicist who died due to radiation exposure from a criticality accident involving a plutonium core. This incident occurred during an experiment involving the assembly of the core in a way that caused a rapid release of neutrons.

Sheri Sangji (1983-2008): Sheri Sangji was a research assistant at the University of California, Los Angeles (UCLA). In 2008, she was working with t-butyl lithium, an extremely reactive and flammable compound. A syringe containing the compound broke, causing a fire that led to her severe burns. She passed away a few weeks later from her injuries.

https://commons.wikimedia.org/wiki/File:Staubexplosion.jpg

https://upload.wikimedia.org/wikipedia/commons/9/9f/Staubexplosion.jpg

Jean Servais Stas (1813-1891): Stas was a Belgian chemist who conducted precise and accurate analyses of chemical compounds. He was known for his work on the atomic weights of elements. Stas died as a result of inhaling toxic fumes from a reaction involving arsenic compounds in his laboratory.

Albert Alexander (1885-1938): Alexander was a British scientist who worked with the drug Fleming initially used to treat bacterial infections. In 1938, he accidentally spilled a small amount of a highly toxic chemical compound called dichloroethyl sulfide (a chemical warfare agent also known as mustard gas) on his hand. Despite decontamination attempts, he suffered severe injuries and died several days later.

Thomas Midgley Jr. (1889-1944): Midgley was an American chemist and engineer known for his work on developing leaded gasoline and chlorofluorocarbon (CFC) refrigerants. Unfortunately, his inventions had significant negative environmental and health impacts. He died of complications related to a pulley system he had developed to help lift him out of bed due to his severe polio-induced disability.

Heinrich Gustav Magnus (1802-1870): Magnus was a German chemist who contributed to various areas of chemistry, including studying the properties of compounds and the interaction of molecules. He died after an accidental explosion in his laboratory while working with nitroglycerin.

These examples underscore the importance of proper safety procedures and protocols in scientific research and experimentation. The tragic consequences of these accidents have led to increased awareness of the potential hazards involved in handling chemicals and the need for rigorous safety measures in laboratory settings. It's crucial to understand that with proper training, adherence to safety guidelines, and a thoughtful approach, the risks can be significantly minimized. By fostering a culture of vigilance, knowledge, and respect for the materials and equipment we work with, we can transform the laboratory into a space of innovative discovery, where researchers and students alike can confidently explore the fascinating world of chemistry while prioritizing their well-being.

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  1. Nice article. We must be careful in laboratory for personal and collective safety.

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