Nature of Matter (Chapter 2) Mixture: composed of ________________________________________ Pure substance: __________________________ Example: Salt water is a mixture of the pure substances NaCl and water Mixtures Classified as ___________________or _____________________ Heterogeneous: ________________________________________ Homogeneous: _________________________________________ Sand and salt: ________________________________ Salt water: ___________________________________ Pure Substances Classified as ____________________________________ Elements: ________________________________________________ Compounds: ______________________________________________ Example: water is a compound formed from the elements hydrogen and oxygen Separations In order to identify substances, must have pure substances with constant properties Must separate mixtures into pure substances Separation of Heterogeneous Mixtures Can use physical means of separation: Separation of Homogeneous Mixtures Separation more difficult because substances are in the same phase Chromatography Allows separation of solution into component parts Chromatography experiment consists of a ________________________ and a ______________________________________ Stationary phase: _____________________________________ Mobile phase: ________________________________________ How does chromatography separate the components of a mixture?
(Chromatography experiment; consists; of a ________________________ and a ______________________________________ Stationary phase) (Salt water; is; a mixture of the pure substances NaCl and water Mixtures Classified as ___________________or _____________________ Heterogeneous: ________________________________________ Homogeneous: _________________________________________ Sand and salt: ________________________________ Salt water) (substances; are; in the same phase) (water Mixtures; Classified; as ___________________or _____________________ Heterogeneous) (Pure Substances Classified; Must separate; mixtures; into pure substances Separation of Heterogeneous Mixtures) (water; is; a compound formed from the elements hydrogen and oxygen Separations) (Pure Substances Classified; Can use; physical means of separation) (a compound; formed; from the elements hydrogen and oxygen Separations)
Chromatography experiment Salt water substances water Mixtures Pure Substances Classified water Pure Substances Classified a compound
consists is are Classified Must separate is Can use formed
of a ________________________ and a ______________________________________ Stationary phase
a mixture of the pure substances NaCl and water Mixtures Classified as ___________________or _____________________ Heterogeneous: ________________________________________ Homogeneous: _________________________________________ Sand and salt: ________________________________ Salt water
in the same phase
as ___________________or _____________________ Heterogeneous
mixtures into pure substances Separation of Heterogeneous Mixtures
a compound formed from the elements hydrogen and oxygen Separations
physical means of separation
from the elements hydrogen and oxygen Separations