Arsenic (Michael Schmidt)

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Arsenic (Michael Schmidt)

  1. 1. By: Michael Schmidt
  2. 2.  Derived from the Latin word arsenicum and the Greek word arsenikos, meaning “masculine” or “male” Known since Ancient Rome and Greece, but many craftsman saw the element without realizing what is was. Credit for the discovery goes to the alchemist Albert the Great (Albertus Magnus) in 1250 A.D.
  3. 3.  Solid at room temperature Three distinct forms ◦ Gray metallic sheen ◦ Yellow arsenic, prepared by cooling gray arsenic vapor in liquid air ◦ Black arsenic, developed by cooling arsenic vapor at 100°C-200°C
  4. 4.  Melting Point: 1090 K (817°C) Boiling Point: 887 K (614°C) ◦ Melting Point is higher because in order to form liquid arsenic, the atmospheric pressure must be increased by 28 times Density: At 293 K, 5.72g/cm3
  5. 5.  33 known isotopes and 10 isomers As-75 is the only one that occurs naturally and is stable 14 radioactive isotopes  None of the isotopes have any important commercial use As-75
  6. 6.  Found in abundance in the earth’s crust, and small quantities in rock, soil, water and air Industrial processes contribute to presence of arsenic in the air, water, and soil Present in many different forms ◦ Adheres to particles in the atmosphere ◦ Is in the stable form arsenate in water ◦ Strongly adheres to weathered rock and soil
  7. 7.  People can remove arsenic from its ores by first, heating it to chemically convert arsenic sulfide to arsenic oxide Arsenic oxide is heated with charcoal (pure carbon) The carbon reacts with the oxygen, leaving behind pure arsenic Cost (pure): $320 per 100 g
  8. 8.  Does not have many uses by itself, but is used in compounds: ◦ Lead arsenate, calcium arsenate, and paris green are used in rat poisons, pesticides, herbicides, and insecticides ◦ Chromated copper arsenate is used as a wood preserver due to toxicity to insects, bacteria, and fungus ◦ Added to germanium to make transistors ◦ Gallium arsenide to produce laser light from electricity ◦ Arsphenamine and arsenic trioxide were prescribed for syphilis and trypanosomiasis ◦ Used in ammunition to create harder, rounder bullets
  9. 9.  Used in Middle Ages as poison to commit murder. Named “King of Poison” Does not melt when heated, but instead changes straight to a vapor Atomic mass: 74.9216 amu Top producers of arsenic are China, Peru, Chile, and Morocco.
  10. 10.  "Arsenic." Chemicool Periodic Table. Chemicool.com. 24 Feb. 2011. Web. 11/10/2011 <http://www.chemicool.com/elements/arsenic.html> "Arsenic." Chemistry: Foundations and Applications. Advameg, Inc, 2011. Web. 10 Nov. 2011. <http://www.chemistryexplained.com/elements/ A-C/Arsenic.html> "Arsenic Facts - Interesting & Amazing Information About Arsenic." Lifestyle Lounge - Online Lifestyle Magazine - Lifestyle Management Tips. Web. 10 Nov. 2011. <http://lifestyle.iloveindia.com/lounge/arsenic- facts- 8977.html> "Its Elemental - The Element Arsenic." Science Education at Jefferson Lab. Thomas Jefferson National Accelerator Facility. Web. 10 Nov. 2011. <http://education.jlab.org/itselemental/ele033.html> "Scientific Facts on Arsenic." GreenFacts - Facts on Health and the Environment. GreenFacts, 2004. Web. 10 Nov. 2011. <http:// <www.greenfacts.org/en/arsenic/index.htm> "The Nitrogen Family: ARSENIC!!" Carondelet High School. Web. 10 Nov. 2011. <http://www.carondelet.pvt.k12.ca.us/Family/Science/Nitrogen/ arsenic.html>

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