Chemistry

Strand three: Chemical world

ELEMENT: Building blocks

Students should be able to:

1. investigate whether mass is unchanged when chemical and physical changes take place

Can I?....

  1. Describe what a physical change is ☐
  2. Give two examples of a physical change ☐
  3. Explain what a chemical change is ☐
  4. Give two examples of a chemical change ☐
  5. Distinguish between physical and chemical changes (what makes them different?) ☐
  6. Describe an experiment that describes whether mass changes during a physical change ☐
  7. Describe an experiment that describes whether mass changes during a chemical change ☐
  8. State the law of conservation of mass ☐

2. develop and use models to describe the atomic nature of matter; demonstrate how they provide a simple way to account for the conservation of mass, changes of state, physical change, chemical change, mixtures, and their separation

  1. Define matter (explain what matter is) ☐
  2. Name three states of matter ☐
  3. Describe and explain ‘particle theory’ ☐
  4. Describe the particles in a solid, liquid and gas ☐
  5. Describe the properties of a solid ☐
  6. Describe the properties of a liquid ☐
  7. Describe the properties of a gas ☐
  8. Explain diffusion and give some examples ☐
  9. Explain the term ‘changing of state’ ☐
  10. Define melting and describe the movement of particles as it occurs ☐
  11. Define boiling and describe the movement of particles as it occurs ☐
  12. Define freezing and describe the movement of particles as it occurs ☐
  13. Define condensing and describe the movement of the particles as it

occurs

14. Define evaporation and describe the movement of particles as it occurs. ☐

Explain what a mixture is. Give 3 examples ☐

  1. Explain filtration. Draw a diagram of a filtration experiment. Name a mixture that can be separated by filtration. ☐
  2. Explain evaporation. Draw a diagram of an evaporation experiment. Name a mixture that can be separated by evaporation. ☐
  3. Explain condensation. ☐
  4. Explain distillation. Draw a diagram of a distillation experiment. Name a mixture that can be separated by distillation. ☐
  5. Explain chromatography. Draw a diagram of chromatography experiment. Name a mixture that can be separated by chromatography. ☐

Use my ‘particle spectacles’ to describe how particles act during these separation techniques.

3. describe and model the structure of the atom in terms of the nucleus, protons, neutrons and electrons; comparing mass and charge of protons neutrons and electrons

1. Compare the charges on electrons, neutrons & protons ☐

2. Compare the mass of electrons, neutrons & protons ☐

3. State where electrons, neutrons & protons are found ☐

4. Be able to define ‘atomic number’ and ‘mass number’ and find the atomic number and mass numbers of elements using the periodic

table ☐

5. Be able to draw the Bohr model of an atom ☐

6. Be able to describe a model of the atom that you made ☐

4. classify substances as elements, compounds, mixtures, metals, non-metals, solids, liquids, gases and solutions.

1. Define element, compound and mixture ☐

2. Be able to classify a substance as an element/ compound/

mixture ☐

3. List the properties of a metal and a non-metal ☐

4. Be able to give examples of a metal and non-metal ☐

5. Be able to describe the three states of matter – solids, liquids and gases – their particles, and their properties (see LO2) ☐

6. Be able to define soluble, insoluble, solute, solvent and solution ☐

ELEMENT: Systems and interactions

Students should be able to:

5. use the Periodic Table to predict the ratio of atoms in compounds of two elements

1. State the Octet Rule ☐

2. Figure out how many electrons an atom wants to gain or lose to be stable ☐

Be able to predict the ratio of atoms in compounds of two elements and write their chemical formula ☐

6. investigate the properties of different materials including solubilities, conductivity, melting points and boiling points

7. investigate the effect of a number of variables on the rate of chemical reactions including the production of common gases and biochemical reactions

8. investigate reactions between acids and bases; use indicators and the pH scale.

ELEMENT: Energy

Students should be able to:

9. consider chemical reactions in terms of energy, using the terms exothermic, endothermic and activation energy, and use simple energy profile diagrams to illustrate energy changes.

ELEMENT: Sustainability

Students should be able to:

10. evaluate how humans contribute to sustainability through the extraction, use, disposal, and xrecycling of materials.

separate mixtures using filtration

Apparatus ......

Method

  1. Weigh out an empty clean conical flask
  2. Weigh a piece of filter paper
  3. Fold the Filter paper into a cone
  4. Pour the dirty mixture into the filter funnel (Do not allow the water to go higher than the filter paper)
  5. Allow time for the water to filter through
  6. Allow time for the filter paper to dry
  7. Weigh the Filter paper & residue
  8. Weigh the glass beaker & filtrate.

the Filtrate is the substance that gets through the filter

the Residue is the substance that gets caught in the filter