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Chapter 2,3, and 8

Study cards for the unit test by: Mary Temple and Ashley Marler

QuestionAnswer
What two categories are matter divided in? pure substances and mixtures
Why is the composition of an element fixed? an element has a fixed composition because it contains only one type of atom.
How are elements different from compounds? Elements are made from only one type of atom while compounds always contain two or more elements
Why do properties of a mixture vary? because the composition of a mixture is not fixed.
What is the difference between heterogeneous mixtures and homogeneous mixtures? In a Homogeneous mixture the substances are evenly distributed and in a Heterogeneous mixture the parts of the substance are noticeably different from another.
How can you classify a solution, a suspension, or colloid? based on the size of the largest particle you can classify a solution, suspension, or colloid.
Describe the appearance of a solution. transparent but can have color.
How can you tell the difference between a solution and colloid? The Tyndall Effect.
What are three things that affect solubility? Temperature, Pressure, and Polarity
How can you tell the difference between a suspension and a colloid? They are both heterogeneous mixtures but suspensions are cloudy and opaque while colloids are transparent.
Why is salad dressing a suspension? because when salad dressing is left standing it separates into layers.
What are some terms associated with chemical reactions? burns, combust, rust, ect.
What are words associated with physical properties? taste, odor, size, solubility, ect.
What is "Brownian motion"? particles of gas in a constant, random motion
What is endothermic? putting energy in to make a phase change
What is exothermic? getting energy/heat out
Is deposition going from a solid to a gas or a gas to a solid? gas to solid
What speeds up solubility? stirring, crushing, and heating
What does HOFBrINCl stand for? all the dimers
What is most dense? solids liquids or gases? solids
Created by: 00781296
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