1. Equipment
Salt, balances, spatulas, stirring rods
Slide 2, 3 printed

2. PM Explain what happens to sugar when you put it in a cup of tea.
Try to describe and explain dissolving using particle theory (extended writing)
Drawn particles diagrams of solids and liquids to represent the sugar, tea/water,
tea with sugar (mixture)
Described properties of solids and liquids
Solids arranged in rows/have a fixed shape.
Particles in a solid vibrate and are held together closely
Liquids mold to take the shape of the container/particles flow
Liquid particles are relatively close together
Liquid particles have more energy and movement than solids
Described and explained what the particles do during dissolving
7. When sugar dissolves in liquid water/tea, particles of the solid sugar mix with particles of the liquid water/tea
8. To form a solution
9. During dissolving the solute (sugar) is mixed with a solvent (tea/water) to form a solution
10. Solution (tea with sugar) is a mixture that can be separated
You now need to re-draft your work below based on the feedback and targets circled : PM

3. Term
Meaning
Example
Solvent
The mixture formed when a solute has dissolved in a solvent
The salt in sea water
Solute
A substance that will not dissolve
Sand in water
Solution
The liquid in which a solute dissolves
Sea water
Soluble
The substance that dissolved in a liquid to form a solution
The water in sea water
Insoluble
A substance that will dissolve
Salt in water
Term
Meaning
Example
Solvent
The mixture formed when a solute has dissolved in a solvent
The salt in sea water
Solute
A substance that will not dissolve
Sand in water
Solution
The liquid in which a solute dissolves
Sea water
Soluble
The substance that dissolved in a liquid to form a solution
The water in sea water
Insoluble
A substance that will dissolve
Salt in water

4. Retrieval practice
1) What are the missing gaps 1, 2, 3, 4 2) List some of the properties of gases 3) Describe the change of state ‘evaporation’ in terms of closeness, arrangement and motion of particles 4) What does the term sublimation mean? 1 2 3 4

5. TWWL: about solutions and dissolving SO THAT I CAN…
Describe solutions using key terms
Describe a solution as mixture that can be separated
Explain dissolving using the particle model
10/11/2018
Keywords and examples?
Term
Meaning
Example
Solvent
The mixture formed when a solute has dissolved in a solvent
The salt in sea water
Solute
A substance that will not dissolve
Sand in water
Solution
The liquid in which a solute dissolves
Sea water
Soluble
The substance that dissolved in a liquid to form a solution
The water in sea water
Insoluble
A substance that will dissolve
Salt in water

6. Keywords SM Solvent The liquid in which a solute dissolves
Term
Meaning
Example
Solvent
The liquid in which a solute dissolves
The water in sea water
Solute
The substance that dissolved in a liquid to form a solution
The salt in sea water
Solution
The mixture formed when a solute has dissolved in a solvent
Sea water
Soluble
A substance that will dissolve
Salt in water
Insoluble
A substance that will not dissolve
Sand in water

7. Dissolving How much salt can you dissolve in 10cm3 of water?
Higher ability students only

8. Dissolving Working in pairs:
Measure 10 cm3 of water (solvent) into a beaker
Record the mass of beaker + 10 cm3 of water =
Collect a beaker of the solute (salt)
Record the mass of beaker of solute before =
Add a spatula at a time of solute (salt) to your beaker of solvent and stir
Keep adding until no more will dissolve (saturated solution)
Mass of beaker + solution =
Mass of beaker of solute after =
Mass of solute used (before – after) =
36g/100cm3.

9. Dissolving Working in pairs:
Measure 10 cm3 of water (solvent) into a beaker
Record the mass of beaker + 10 cm3 of water =
Collect a beaker of the solute (salt)
Record the mass of beaker of solute before =
Add a spatula at a time of solute (salt) to your beaker of solvent and stir
Keep adding until no more will dissolve (saturated solution)
Mass of beaker + solution =
Mass of beaker of solute after =
Mass of solute used (before – after) =
36g/100cm3.

10. Dissolving What is happening to the particles during dissolving?
This is a mixture of salt and water… do you think you can separate again?
Higher ability students only

11. Dissolving 6 marks Task:
Explain what happens to sugar when you put it in a cup of tea.
Try to describe and explain dissolving using particle theory.
Key words:
dissolve, mixture, solute, solution, solvent, sugar, tea, solid, liquid, particles
Top tips:
Draw particle diagrams to show solids, liquids and dissolving (to represent sugar, water, then mixture forming).
Included properties of solids and liquids
Described what particle do during dissolving and what forms.
Described what a solution is.

12. Tick the points (1-10) they made correctly and circle targets for improvement
Explain what happens to sugar when you put it in a cup of tea.
Try to describe and explain dissolving using particle theory (extended writing)
Drawn particles diagrams of solids and liquids to represent the sugar, tea/water,
tea with sugar (mixture)
Described properties of solids and liquids
Solids arranged in rows/have a fixed shape.
Particles in a solid vibrate and are held together closely
Liquids mold to take the shape of the container/particles flow
Liquid particles are relatively close together
Liquid particles have more energy and movement than solids
Described and explained what the particles do during dissolving
7. When sugar dissolves in liquid water/tea, particles of the solid sugar mix with particles of the liquid water/tea
8. To form a solution
9. During dissolving the solute (sugar) is mixed with a solvent (tea/water) to form a solution
10. Solution (tea with sugar) is a mixture that can be separated
You now need to re-draft your work below based on the feedback and targets circled : PM

13. Extension
Why is the mass of the solution the sum of the mass of the water plus the mass of the salt, but the volume of the solution does not go up to 100 cm3.
Higher ability students only

14. Reflection How do you feel about today’s objectives?
Choose a face and write why you feel this way
(I think I can now _______ because ______________)
Describe solutions using key terms
Describe a solution as mixture that can be separated
Explain dissolving using the particle model