Properties of substances and Mixtures - Learning Outcomes
Physical and chemical properties (2.1)
Physical Properties
Solids, liquids and gases (2.2)
Changes of state (2.3)
Types of mixtures (4.1)
Separating insoluble substances (4.2)
Separating soluble substances (4.3)
Physical Properties
- Appearance like shiny or dull, colour
- Solid, liquid or gas at room temp
- Boiling and melting points
- Hardness/brittleness
- Conductivity of heat and electricity
- Solubility (can be evaporated from solvent and reclaimed)
- Density
- Reactivity with oxygen, water, acids, bases and other chemicals
Solids, liquids and gases (2.2)
- Use of the particle model to describe the properties of solids, liquids and gases including arrangement, movement and distance between particles.
- The ability of the state to take the shape of the container or be compressed
Changes of state (2.3)
- Use the particle model to explain changes of state: melting, freezing, evaporation, condensing, sublimation
Types of mixtures (4.1)
- Pure substances vs mixtures
- Solutions- insoluble and soluble matter, solutes and solvents, concentrated vs. dilute solutions
- Suspension- sediments, colloids, emulsions
Separating insoluble substances (4.2)
- Gravity separation, sieving, filtering, magnetic separation, centrifuging, electrostatic separation.
- Uses of these techniques in the home
Separating soluble substances (4.3)
- chromatography, evaporation, distillation.
Assessment Tasks
- Test