Aim: To learn about a saturated solution and how to make crystals
Definition of solution:
A liquid mixture, when something is dissolved into a liquid (eg: sugar in water)
Definition of saturated:
Having or holding as much as can be absorbed of something (when no more sugar or borax can be dissolved into the water)
In groups of three you will make three different types of crystals and compare the results.
Ratio; 3 Tablespoons Borax per 1/2 cup water
Materials
1)
2)
3)
4)
5)
Process
Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Step 6:
Sugar Crystals
Materials
1)
2)
3)
4)
5)
Process
Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Step 6:
Ratio: 4 Tablespoons salt to 1/2 cup water
Materials
1)
2)
3)
4)
5)
Process
Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Step 6:
Findings
Describe your crystals in the table below.
Crystal Type
|
Shape
(Describe the shape) |
Size
(of individual crystals) |
Hardness
(Crumbly to Rock Hard) |
Borax
 | |||
Sugar
 | |||
Salt
 |
What crystals worked out best and why?:
Conclusion:
________________________________________________________________________
Conclusion:
________________________________________________________________________
After watching the videos as a class, explain how the following crystals are formed:
Type
|
Explanation
|
Salt
|
As the water evaporates from the solution, the Na and Cl atoms begin to bond together, first as single molecules and then the molecules bond together, forming crystals. Every molecule will form the same shape crystal each time it forms. The crystal shape for salt is a cube like a six-sided die.
|
Sugar
|
Crystallization is the process just after evaporation. ... Then in the crystallization process, the syrup is boiled at low temperatures under partial vacuum and some seedings are added which causes the development and growth of sugar crystals and the outcome is called massecuite (raw sugar crystals mixed with molasses
|
Snowflakes
|
A snowflake begins to form when an extremely cold water droplet freezes onto a pollen or dust particle in the sky. This creates an ice crystal. As the ice crystal falls to the ground, water vapor freezes onto the primary crystal, building new crystals – the six arms of the snowflake.
|
CRYSTAL TYPES
AIM: TO LOOK AT THE 7 DIFFERENT TYPES OF CRYSTALS
 |
| Salt Crystals |
| Sugar Crystals |
 |
| Borax Crystals |
7 different crystal shapes
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