crystal is a solid with a definite geometric shape. The shape consists
of smooth, flat surfaces that meet in sharp edges or corners.
- A branch of Chemistry that studies crystals and their structure.
- When solute molecules in a saturated solution
encounter a dust particle or a solid surface (like a string or a
seed crystal), they will tend to adsorb and
aggregate on the surface. The solid surface provides the nucleation
site for the formation of crystals.
is a process that has been used to purify solid material by dissolving
the solid substance in an appropriate liquid and then having the
material come out of solution in crystalline form.
solution - Solution where the maximum amount of solutes is dissolved
in the solvent.
crystal - A starting surface for a growing crystal.
of Crystal - The atoms in a crystal occupy positions with definite
geometrical relationships to each other. This structural arrangement
of its atoms. is uniquely defined by the chemistry of the substance
and determines the shape of the crystal. In crystallography, the
shapes of crystals can be grouped into seven systems:
These are covered in more details in Activity
#5 - Shapes and Polyhedra.
- The maximum amount of solute that can be dissolved in a certain
volume of solvent at a given temperature is known as the solubility
of the solute. The solubility of the solute usually increases with
an increase of temperature.
- Dissolved substance in a solution.
- A uniform mixture of two or more substances. For example, sugar
dissolved in water is a solution.
- The liquid into which the solute is dissolved. The solvent of
choice in this lab is water.