Chem. Study for Finals

• What does WHMIS stand for?

  Workplace Hazardous Materials Information System
• What is the purpose of WHMIS?

  Indicate hazardous materials and communicate safety
• What symbol indicates a health hazard in WHMIS?

  Silhouette of a person with a star
• What does the flame symbol in WHMIS indicate?

  Indicates flammable materials
• What does the exclamation mark symbol in WHMIS represent?

  General hazards like irritation or sensitization
• What does the gas cylinder symbol in WHMIS indicate?

  Gases under pressure
• What does the corrosion symbol in WHMIS indicate?

  Materials causing skin burns or eye damage
• What does the exploding bomb symbol in WHMIS indicate?

  Explosives
• What does the skull and crossbones symbol in WHMIS indicate?

  Acute toxicity
• What are the contents of a Material Safety Data Sheet (MSDS)?

  • Product identification
  • Hazard identification
  • Composition/information on ingredients
  • First-aid measures
  • Fire-fighting measures
  • Accidental release measures
  • Handling and storage
  • Exposure controls/personal protection
  • Physical and chemical properties
  • Stability and reactivity
  • Toxicological information
• What are physical properties of matter?

  Characteristics observed without changing substance
• Give an example of a physical property.

  Melting point
• What are chemical properties of matter?

  Characteristics describing ability to undergo changes
• Give an example of a chemical property.

  Reactivity with acids
• What distinguishes pure substances from mixtures?

  Pure substances have a fixed composition
• What are the two types of mixtures?

  Homogeneous and heterogeneous
• What is a homogeneous mixture?

  Uniform composition
• Give an example of a homogeneous mixture.

  Saltwater
• What is a heterogeneous mixture?

  Non-uniform composition
• Give an example of a heterogeneous mixture.

  Salad
• What are elements?

  Substances that cannot be broken down chemically
• What are compounds?

  Substances formed from two or more elements
• How do compounds differ from their constituent elements?

  Compounds have distinct properties from elements
• What is a solution?

  A homogeneous mixture with uniformly distributed components
• Give an example of a solution.

  Saltwater
• What is a mechanical mixture?

  A heterogeneous mixture with non-uniform distribution
• Give an example of a mechanical mixture.

  Granite
• What is a suspension?

  A heterogeneous mixture where particles can settle
• Give an example of a suspension.

  Muddy water
• What is a colloid?

  A mixture where particles do not settle out
• Give an example of a colloid.

  Milk
• What are indicators of a chemical reaction?

  Color change, odor change, gas formation, precipitate formation, temperature change
• What does a color change indicate in a chemical reaction?

  Formation of a new substance
• What does an odor change indicate in a chemical reaction?

  New smells signify new chemicals
• What does gas formation indicate in a chemical reaction?

  Bubbling or fizzing indicates gas release
• What does precipitate formation indicate in a chemical reaction?

  Solid forms from a solution
• What does a temperature change indicate in a chemical reaction?

  Exothermic or endothermic reactions alter temperature
• Who established the Law of Conservation of Mass?

  Antoine Lavoisier
• What does the Law of Conservation of Mass state?

  Mass is neither created nor destroyed
• What are the implications of the Law of Conservation of Mass?

  Total mass of reactants equals total mass of products