Lesson 1 Flashcards
(70 cards)
____ is made up of atoms or molecules
Matter
The ______ of these molecules determines the state of matter.
arrangement
_____ can change be between states when the temperature or pressure is changed. State changes of matter are physical rather than chemical.
Matter
more then one set of intensive properties, and thus more than one phase
heterogeneous matter
uniform intensive properties throughout single phase only
homogeneous matter
heterogeneous and homogeneous matter is divided into two:
mixture and pure substance
pure substances have 2 kinds:
elements and compounds
mixture has 2 kinds:
homogeneous and heterogeneous
-simplest type of Matter that is composed of one kind of atom
element
-composed of two or more elements combined chemically
compound
mixture in a single phase
homogeneous
more then one set of intensive properties, and thus more than one phase
heterogeneous
different physical separation techniques
washing, filtration, distillation, chromatography
____ can also be done with organic solvents when there is a mixture with soluble impurities and insoluble compound.
washing
insoluble solids like noble metals and compounds like silica can be _____ with water until all the other impurities leave them.
washed
insoluble solids like noble metals and compounds like ____ can be washed with water until all the other impurities leave them.
silica
____ is a good for separating an insoluble solid a liquid.
filtration
An _____ substance is one that does dissolve
insoluble
sand, for example, can be separated from a mixture of and water using ______. because sand does not dissolve in water.
filtration
-a process that depends on differences in the volatility of the components.
distillation
_____ (how readily substances become gases)
volatility
-the most volatile component vaporizes at the lowest temperature, and the vapor passes through a cooled tube (a condenser), where it condenses back into its liquid state.
distillation
-employ a system with two phases (states) of matter: a mobile phase and a stationary phase. The stationary phase is a solid, and the mobile phase is either a liquid or a gas.
chromatography
it works because some of the colored substances dissolve in the liquid better than others, so they further up the paper.
chromatography
