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Gen Chem Prelims > Measurement and Separation Techniques > Flashcards

Measurement and Separation Techniques Flashcards

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1
Q

observations of the
physical and chemical properties
and changes that matter undergoes
that are often reported
quantitatively

A

Measurement

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2
Q

quantify the property of an object and gives full context to
the numbers of the property being measured

A

Units

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3
Q

nvented by French in the 18th century

A

Metric system

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4
Q

based on the powers of ten

A

Metric system

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5
Q

system used in some US countries

A

English system

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6
Q

1960

A

International system of Units (SI Units)

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7
Q

global
standard definition of units of measurement

A

International system of Units (SI Units)

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8
Q

remain the same regardless of the place where it is used

A

International system of Units (SI Units)

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9
Q

other units of measurement obtained by
a combination of base units

A

Derived units

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10
Q

give the SI Base Unit and symbol of

Length

A

Meter, m

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11
Q

give the SI Base Unit and symbol of

Mass

A

Kilogram, kg

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12
Q

give the SI Base Unit and symbol of

Time

A

Second, s

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13
Q

give the SI Base Unit and symbol of

Temperature

A

Kelvin, K

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14
Q

give the SI Base Unit and symbol of

Amount of Substance

A

Mole, mol

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15
Q

give the SI Base Unit and symbol of

Electric Current

A

Ampere, A

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16
Q

give the SI Base Unit and symbol of

Luminous intensity

A

Candela, cd

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17
Q

give the SI Base Unit and symbol of

Density

A

gram per cubic meter, g/m3

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18
Q

give the SI Base Unit and symbol of

Speed

A

Meter per second, m/s

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19
Q

give the SI Base Unit and symbol of

Energy

A

Joule, J

20
Q

Formula for 1J

A

kg·m2/s2

21
Q

Temperature conversion factors for cels9 ius

A

C=(F- 32) 5/9

22
Q

Temperature conversion factors for fahrenheit

A

F=9/5(C)+32

23
Q

Temperature conversion factors for fahrenheit

A

K= C+273

24
Q

Give prefix and sym

A
25
Q

the only digits in a given measurement that are certain and are considered practical for use in calculations
involving scientific measurements

A

Significant Figures

26
Q

true or false

A measurement with more SF is more certain than a
measurement with fewer SF

A

true

27
Q

true or false

A measurement with less SF is more certain than a
measurement with more SF

A

false

28
Q

Rules in Counting Significant Figures

A
  1. All nonzero digits
    are significant
  2. All zeroes between nonzero digits (internal zeroes) are
    significant.
  3. Zeroes before the
    first nonzero digits
    (leading zeroes) are
    not significant
  4. Zeroes after the last nonzero digits (trailing zeroes) may or may not be
    significant.
29
Q

what are the two operations with significant figures

A
  1. Addition and Subtraction
  2. Multiplication and Division
30
Q

must have the same number of decimal places as the
measurement with the fewest number of decimal places.

A

Addition and Subtraction

31
Q

follow the least
number of significant figures from the original measurement.

A

Multiplication and Division

32
Q

combination of
trueness and precision

A

Accuracy

33
Q

nearness of
measurement to the true value

A

Trueness

34
Q

nearness of the
values of multiple
measurements to each other

A

Precision

35
Q

Physical Methods of Separation

A

Filtration
Distillation
Chromatography

36
Q

involves the separation of the solid component of
a mixture from its liquid component

A

Filtration

37
Q

solids mixed with
gases

A

Filtration

38
Q

mixture passes through porous surface or
membrane that enables liquids or gases to pass but the solids

A

Filtration

39
Q

separated solids

A

Residue

40
Q

gas without the solid component

A

Filtrate

41
Q

Examples of filtration

A

air conditioners and water purifiers

42
Q

separate two or more different liquids and
gases that form a mixture

A

Distillation

43
Q

can also be used to separate solids that are small for porous membranes to separate from their fluid medium, relies on volatilities of components

A

Distillation

44
Q

– condensed vapor

A

Distillate

45
Q

examples of distillation

A

perfume, alcoholic drinks, and, crude oil production; and
desalination of seawater

46
Q

can be used to separate constituent parts of a mixture, particularly homogenous mixtures

A

Chromatography

47
Q

fixed mediums could be

A

paper, gel, or cellulose

Gen Chem Prelims (14 decks)

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