Chemistry 2.100

Understanding the World through Chemistry

002.100 Understanding the World through Chemistry (3) This course introduces students to the principles of chemistry necessary for an understanding of contemporary issues in agriculture, the environment, industry, medicine, and the economy. High school chemistry is not required. May be used as a prerequisite (minimum grade of B) for 2.130 (Developmental Section). Not to be held with the former 2.125. May not be used to fulfill chemistry requirements in a Chemistry Honors, Major, General, or Minor program. Not available to students who have previously obtained credit in, or are concurrently registered in, any 200 level university chemistry course.



Course Outline - 2005

Instructor:

Lectures:

Recommended Textbooks:

Sheets:

Review Sheets:

Grading:


The Frank & Donna Hruska Prize:


Important information in the 'General Calendar':

QUIRKS & QUARKS:

Quirks and Quarks is a CBC radio program on Saturdays (12:05-1:00 pm) which provides interesting discussions of current issues in chemistry, astronomy, medicine, genetics, the environment, etc, etc. Listen to this informative program while you are eating lunch. You will hear ideas that should impress your colleagues - and professors - the following week.


TOPICS

INTRODUCTION

  1. Usefulness of chemistry and the problems it creates. Matter: Substances (elements and compounds) and mixtures of substances. Composition and structure of substances. Physical and chemical properties and changes. Observations and Measurements. Elements and atoms of the ancients.

ELEMENTS AND THE PERIODIC TABLE

  1. Names and symbols of the elements. The Periodic Table.
  2. General features of the Periodic Table: A) States of matter: solids, liquids and gases. States of the elements. Melting points and boiling points. Behaviour of particles in solids, liquids and gases. Refrigerators and air conditioners. B) Metals, nonmetals and metalloids. Density. C) Elemental composition of our bodies. D) Elemental composition of the Earth's crust. E) Etymology of the names of elements.

STRUCTURE OF ATOMS

  1. Introduction: A) Mass, weight and gravity. B) Electricity and magnetism. Static electricity. Benjamin Franklin, Humphrey Davy, Mary Shelley and Frankenstein.
  2. Structure of atoms. A) Subatomic particles: protons, neutrons and electrons, their charge and mass, and arrangement in atoms. B) Atomic number (Z) and mass number (A). C) Electronic structure of atoms. E) Isotopes.
  3. Radioactivity: its discovery by Henri Becquerel. Marie and Pierre Curie. Types of natural radioactivity: alpha (a) particles, beta (b) particles and gamma (g) rays. Half-life. Uses of radioactivity: smoke detectors, medicine. Radon gas, a radioactive health hazard.

CHEMICAL BONDING

  1. Electron shells and electron dot structures. Types of chemical bonds: ionic, covalent, metallic.

IONIC BONDING AND IONIC COMPOUNDS

  1. Ionic bonds. The facts on sodium chloride and other salts. Crystal structures.
  2. Properties of ionic compounds in the solid state and in water solution. Sodium chloride, a source of chemicals for plastics, manufacture of paper, and water purification.
  3. Ions in nutrition. Hemoglobin and chlorophyll. Calcium in teeth and bones (vitamin D, rickets, osteomalacia). Signal conduction by nerve cells. Iodide, thyroid glands and the hormone thyroxine. Diseases of iodide deficiency: goiter.
  4. Medical uses of ionic compounds: Fluoride and tooth care. Manic depression: a story of 3 metal ions?
  5. Metal ions and disease: lead poisoning, Romans, plumbers, and prostitutes. Why we still use lead and its compounds.

COVALENT BONDS AND MOLECULAR SUBSTANCES

  1. Covalent bonds: sharing of electrons between two non-metal atoms to form molecules.
  2. The H2 molecule. The halogens and hydrogen halides. The properties of acids. The H+ ion in water solution. Stomach acid for digestion of food.
  3. O2 and N2 molecules and multiple covalent bonds. Double and triple bonds. Hydrogen derivatives of nitrogen (ammonia, NH3) and oxygen (H2O).
  4. Molecules with carbon atoms. C compounds with halogens. Tetrafluoroethylene, the precursor from which Teflon is made. Carbon compounds with group 6 elements: carbon dioxide (CO2) and carbon monoxide (CO).

THE ATMOSPHERE

  1. Layers and composition. N2, O2, Ar, CO2, water vapor, and trace gases.
  2. The biological importance of the atmospheric gases: A) N2: Biological nitrogen fixation, the conversion of N2 to ammonia. Symbiotic and free-living nitrogen fixing bacteria. Fixed nitrogen from electrical storms, the formation of NO (nitric oxide) and NO2 (nitrogen dioxide). B) O2: Respiration (similar to the burning of hydrocarbon fuels). Photosynthesis. "Good" ozone in the stratosphere. C) Argon and other group 8 gases: no significant biological importance. D) Carbon dioxide: released during respiration and converted back into biological molecules by photosynthesis.

INDUSTRIAL USES OF ATMOSPHERIC GASES

  1. Isolation of the gases from air.
  2. N2 gas and ammonia synthesis. Haber-Bosch process. Haber: the personal side, involvement in World War I, poison gases. Uses of ammonia (fertilizer and explosives).
  3. O2 gas for making steel, antifreeze, polyester, bleaching pulp and paper. Uses of ozone.
  4. Argon: metal manufacture, incandescent light bulbs, triple-pane windows. Other noble gases.
  5. CO2 gas: dry ice refrigerant, carbonated drinks, manufacture of aspirin, bullet-proof windows, fertilizer.

AIR POLLUTION

  1. Carbon monoxide (CO): formation, properties, and how it poisons us. CO is produced naturally in your bodies in small amounts.
  2. The nitrogen oxides. Nitric oxide and nitrogen dioxide. Role of our automobiles. "Bad" ozone in the troposphere. The chemical connection between car exhaust and the mechanism of action of Viagra.


Useful Web Sites for Chemistry 2.100:

Start WebElements

Global Warming Site


Aspirin


Return to the Chemistry Department Course Descriptions

Return to Dr. Hruska's Home Page


http://home.cc.umanitoba.ca/~joneil/2.100.Course.outline.htm

Maintained by J. O'Neil


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