22 terms

Physical Science chap. 22

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D.) chemical compounds may be found in a chemical mixture
A chemical mixture is distinguished from a chemical compound in that
D.) differences in chemical properties
The components of a mixture are most effeciently separated from one another based upon their
D.) b and d
Of the four boxes below (not pictured) which contains a chemical compound?
D.) a, c, and d
Of the four boxes (not shown), which contains elements?
A.) d only
Of the four boxes (not pictured), which contain a chemical mixture?
C.) a suspension will separate into different phases when centrifuged
By what means can a solution and a suspension be distinguished?
C.) homogeneous mixture
Clean dry air is an example of a
A.) a, b, and c
Pure material is found in boxes (not shown)
C.) d only
Which of the submicroscopic views in the boxes are most likely for a heterogenous mixture?
An alloy
Atoms or ions can be blended in any proportion within
C.) it is a mixture of different elements
Steel is not listed in the periodic table because
B.) a very large number
If you had one mole of marbles, how many would you have?
C.) increases because material is being added to it
When sugar is dissolved in water, the volume of water
B.) it is a homogeneous mixture of chromium in aluminum oxide
Why is a ruby gemstone considered to be a solution?
C.) large amounts of solute are dissolved in solvent
When a solution is concentrated
D.) volume and concentration of the solution
To calculate the amount of solute in a solution, we need to know the
Similar b/c they are both pure substances.
They are different b/c element has one kind of atom while compound has multiple.
Compare element to compound
Similar b/c they're both homogeneous mixtures. They're different b/c in a solution all of the parts are in the same places
Compare solution and suspension
Same b/c they are both mixtures of two or more things. Different b/c homogeneous are evenly mixed. For example, Kool-Aid.
Compare homogenous mixture and heterogeneous mixture
1. Filtration; separate based on particle size
2. Distillation; separate liquids based on boiling points
3. Centrifuge; separate according to density
4. Magnet
Name and describe 3 different separation techniques.
Stir mixture w/ a magnet, pour salt/sand into filter, run water through it because sand can't filter through. Boil water to get only salt.
Describe how you could separate a mixture of salt, sand, and iron fillings.
Separated by distillation. Gasoline comes out, diesel comes out, chemicals come out.
Describe how crude oil is separated into multiple components
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