Natural Sciences and Technology Grade 6-A - Thunderbolt Kids

3. Complete the following sentences by writing saturated or
unsaturated in the open spaces.
a. When no more solute can dissolve in asolution, we say it is
a _______________ solution.
b. When more solute can be dissolved in asolution, we say
the solution is _________________.
Now let's have some fun with saturated solutions!
ACTIVITY: Making sugar crystals
MATERIALS:
• 1/2 cup water
• 1 cup table sugar
• clean glass jar
• food colouring
• pencil
• rough string (cooking twine works great)
• beaker or pan for boiling water and making solution
• spoon
• stove or Bunsen burner and stand
INSTRUCTIONS:
1. Tie a length of string onto a pencil. The string should be long
enough to reach almost to the bottom of your glass jar.
2. Make a saturated sugar solution by boiling the water in the
pan, slowly adding sugar ateaspoon at a time. If you have a
Bunsen burner and stand, you can do this in abeaker over the
flame.
3. Stir after each spoonful and keep adding sugar until the sugar
won't dissolve any more in the water. If you do not add
enough sugar, your crystals will not grow quickly. If you use
too much sugar, your crystals will grow on the undissolved
crystals and not on the string.
Chapter 3. Solutions as special mixtures
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