according to the phase diagram below, what is the boiling point of this substance at a pressure of...
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C. Johannesson
According to the phase diagram below, what is the boiling point of this substance at a pressure of 30 atmospheres?
Bell Work
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C. Johannesson
Ch. 1 - Matter
II. Classification of Matter
(p.15-17, 397-398)Matter Flowchart
Pure Substances
Mixtures
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C. Johannesson
A. Matter Flowchart
MATTER
Can it be physically separated?
Homogeneous Mixture
(solution)
Heterogeneous Mixture Compound Element
MIXTURE PURE SUBSTANCE
yes no
Can it be chemically decomposed?
noyesIs the composition uniform?
noyes
Colloids Suspensions
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Matter
Matter is everywhere. Matter is anything that takes up
space and has mass. Matter is constantly
experiencing both chemical and physical changes.
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C. Johannesson
A. Matter Flowchart
Examples:
graphite
pepper
sugar (sucrose)
paint
soda
element
hetero. mixture
compound
hetero. mixture
solution
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C. Johannesson
B. Pure Substances
Element composed of identical atoms EX: copper wire, aluminum foil
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C. Johannesson
B. Pure Substances
Compound
composed of 2 or more elements in a fixed ratio
properties differ from those of individual elements
EX: table salt (NaCl)
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C. Johannesson
B. Pure Substances
Law of Definite Composition
A given compound always contains the same, fixed ratio of elements.
Law of Multiple Proportions
Elements can combine in different ratios to form different compounds.
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C. Johannesson
B. Pure Substances
For example…
Two different compounds, each has a definite composition.
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C. Johannesson
C. Mixtures
Variable combination of 2 or more pure substances.
Heterogeneous Homogeneous
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C. Johannesson
C. Mixtures
Solution homogeneous very small particles no Tyndall effect Tyndall Effect
particles don’t settle EX: rubbing alcohol
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C. Johannesson
C. Mixtures
Colloid heterogeneous medium-sized particles Tyndall effect particles don’t settle EX: milk
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C. Johannesson
C. Mixtures
Suspension heterogeneous large particles Tyndall effect particles settle EX: fresh-squeezed
lemonade
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C. Johannesson
C. Mixtures
Examples:
mayonnaise
muddy water
fog
saltwater
Italian salad dressing
colloid
suspension
colloid
solution
suspension