Unit A

• • WHMIS stands for Workplace Hazardous Materials Information System. Hazard symbols have a safety warning and a shape to indicate how hazardous the material is. A red octagon indicates danger, an orange diamond stands for warning and the yellow triangle shows hazard or caution
• • Slurry technology is transporting solids by using liquids
• Properties of a fluid:Viscosity, density, bouncacy, compressibility
• • Pure Substance: A substance made up of one type of matter. Ex. An element or a compound
• Suspension: a cloudy mixture and separates over time. Ex. Tomato juiceColloid: a cloudy mixture but the particles are too small to separate. Ex mil
• • A solution is made up of a solute and a solvent. The solute is the substance that gets dissolved and the solvent does the dissolving.Water is known as the universal solvent and a solution with the water as the solvent is called an aqueous solution
• • Concentration of a solution tells you the amount of solute dissolved in a specific amount of solvent. Ex. a solution with 50 g of solute dissolved in 100 mL of water has a concentration of 50 g/ 100 mL of water.When a solution is concentrated it has a large amount of solute and a small amount of solventWhen a solution is diluted it has a small amount of solute and a large amount of solvent
• 3 factors that affect solubility

  1. Type of solute
  2. Type of solvent
  3. Temperature
• hen the temperature is heated up the solubility in a solid or liquid solution increases. In a gas solution it is the reverse. The solubility decreases.
• • Particle model of matter:

  1. All matter is made of tiny particles
  2. Particles have spaces in between them
  3. Particles are always moving
  4. (particles may be attracted to each other or bonded together)
• • Viscosity: the resistance of a liquid to flow. If a liquid has a high flow rate then it has a low viscosity. Ex. Syrup would have a higher viscosity than water
• • Density: the amount of matter in a given volume.A less dense object floats on a more dense substance because of buoyant force
• • As temperature increases decreases viscosity it increases density
• • Buoyancy is the tendency of an object to float when placed in a fluid. This is the force that opposes gravity.
• • Pascal’s Law- when force is applied to a liquid in an enclosed container, the pressure and is transmitted equally in all directions throughout the liquid. Because of this, technologies like hydraulic and pneumatic devices were created
• •     the rate, volume, pressure,     and direction of flow
  • Valves - devices used to control or regulate the amount of flow of fluids (liquid or gas)
  • Today’s valves also control