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Bell Work. According to the phase diagram below, what is the boiling point of this substance at a pressure of 30 atmospheres? . Ch. 1 - Matter. II. Classification of Matter (p.15-17, 397-398) Matter Flowchart Pure Substances Mixtures. MIXTURE. PURE SUBSTANCE. yes. no. yes. no.

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bell work

Bell Work

According to the phase diagram below, what is the boiling point of this substance at a pressure of 30 atmospheres?

C. Johannesson

ch 1 matter

Ch. 1 - Matter

II. Classification of Matter

(p.15-17, 397-398)

Matter Flowchart

Pure Substances

Mixtures

C. Johannesson

a matter flowchart

MIXTURE

PURE SUBSTANCE

yes

no

yes

no

Is the composition uniform?

Can it be chemically decomposed?

Colloids

Suspensions

A. Matter Flowchart

MATTER

yes

no

Can it be physically separated?

Homogeneous Mixture

(solution)

Heterogeneous Mixture

Compound

Element

C. Johannesson

matter
Matter
  • Matter is everywhere.
  • Matter is anything that takes up space and has mass.
  • Matter is constantly experiencing both chemical and physical changes.
a matter flowchart1
A. Matter Flowchart
  • Examples:
    • graphite
    • pepper
    • sugar (sucrose)
    • paint
    • soda

element

hetero. mixture

compound

hetero. mixture

solution

C. Johannesson

b pure substances
B. Pure Substances
  • Element
    • composed of identical atoms
    • EX: copper wire, aluminum foil

C. Johannesson

b pure substances1
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)

C. Johannesson

b pure substances2
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.

C. Johannesson

b pure substances3
B. Pure Substances
  • For example…

Two different compounds, each has a definite composition.

C. Johannesson

c mixtures
C. Mixtures
  • Variable combination of 2 or more pure substances.

Heterogeneous

Homogeneous

C. Johannesson

c mixtures1

Tyndall Effect

C. Mixtures
  • Solution
    • homogeneous
    • very small particles
    • no Tyndall effect
  • particles don’t settle
  • EX: rubbing alcohol

C. Johannesson

c mixtures2
C. Mixtures
  • Colloid
    • heterogeneous
    • medium-sized particles
    • Tyndall effect
    • particles don’t settle
    • EX: milk

C. Johannesson

c mixtures3
C. Mixtures
  • Suspension
    • heterogeneous
    • large particles
    • Tyndall effect
    • particles settle
    • EX: fresh-squeezed lemonade

C. Johannesson

c mixtures4
C. Mixtures
  • Examples:
    • mayonnaise
    • muddy water
    • fog
    • saltwater
    • Italian salad dressing

colloid

suspension

colloid

solution

suspension

C. Johannesson