Science Lab Experiment: Making Rock Candy
Demonstration: Preparation of Rock Candy
Object: To grow crystals.
Materials: 1 cup boiling water, 1 3/4 cups sugar (granulated), string, beaker,
heater, ring stand
Method: About 1> cups of sugar were added to a cup of boiling water.
The materials were stirred to dissolve all the sugar and
allowed to cool. The solution was poured into a beaker and
a piece of string was suspended in it.
Observations: Crystals were observed to collect on the string over a
period of days, while the beaker sat undisturbed.
Conclusions: Crystals are formed when a supersaturated solution is allowed
to cool. More sugar was dissolved in boiling water than
could be absorbed at room temperature. When the solution cooled,
the extra solute formed crystals.