Solutions and substances may sometimes be difficult to identify and classify because of similarities
in some of their properties, particularly physical properties. Most of the time, we only rely on our sense
of sight or smell in identifying such substances or mixtures. In the given situation, both acetone and
salt-water solution are clear liquids, but acetone has a distinct smell and the salt-water solution has a
distinct taste. Other physical and chemical properties may also be used to identify substances and
mixtures.
Smelling or tasting unknown substances and mixtures however, is not recommended to do
because of their hazards. Try to examine your answers. Do you think your suggested method of
identifying the contents is considered safe? Why? If you think it is unsafe, what else can you do to
identify and classify them?​