Unit Summary

Use the following table to review what you have learned in this unit.



Questions

Summary


  1. What are the properties of mixtures?

      2. 1.1 What are the properties of water?

      1.2 How can mixtures be identified?

      1.3 How can mixtures be separated?

  • Water has unique properties that make it useful in chemistry (universal solvent, surface tension, etc.)
  • Mixtures and solutions can be identified based upon what they are composed of.
  • Materials can be separated by using their physical and chemical properties.

  1. What is a chemical reaction?

      2. 2.1 What is the difference between a physical and a chemical change?

  • A chemical change produces a new substance.
  • Chemical changes can also result in the production of a colour change, gas, heat, light, or a precipitate. They are usually irreversible.
  • Changes are reversible if the substances that were changed can be returned back to their original state.
  • Acids and bases can be identified through the use of an indicator and their properties.
  • Carbon dioxide has different properties than air. It can be produced through different chemical or physical changes.