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GENCHEM > LESSON 2: MEASUREMENT AND SEPERATION TECHNIQUES > Flashcards

LESSON 2: MEASUREMENT AND SEPERATION TECHNIQUES Flashcards

1
Q

these are the 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

invented by FRENCH in the 18th century; based on the powers of ten

A

METRIC SYSTEM

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4
Q

system used in some US countries

A

ENGLISH SYSTEM

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5
Q

1960; GLOBAL standard definition of units of measurement that would remain the same REGARDLESS OF THE PLACE where it is used

A

INTERNATIONAL SYSTEM OF UNITS (SI UNITS)

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6
Q

other units of measurement obtained by a combination of base units

A

DERIVED UNITS

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7
Q

SEVEN STANDARD BASE UNITS

A

length
mass
time
temperature
amount of substance
electric current
luminous intensity

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8
Q

BASE UNITS:
length

A

meter

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9
Q

BASE UNITS:
mass

A

kilogram

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10
Q

BASE UNITS:
time

A

second

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11
Q

BASE UNITS:
temperature

A

kelvin

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12
Q

BASE UNITS:
amount of substance

A

mole

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13
Q

BASE UNITS:
electric current

A

ampere

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14
Q

BASE UNITS:
luminous intensity

A

candela

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15
Q

SYMBOL:
length

A

m

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16
Q

SYMBOL:
mass

A

kg

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17
Q

SYMBOL:
time

A

s

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17
Q

SYMBOL:
time

A

s

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18
Q

SYMBOL:
temperature

A

K

19
Q

SYMBOL:
amount of substance

A

mol

20
Q

SYMBOL:
electric current

A

A

21
Q

SYMBOL:
luminous intensity

A

cd

22
Q

UNITS DERIVED FROM SI BASE UNITS

A

density
speed
energy

23
Q

BASE UNITS:
density

A

gram per cubic meter

24
Q

BASE UNITS:
speed

A

meter per second

25
Q

BASE UNITS:
energy

A

joule

26
Q

SYMBOL:
density

A

g/m3

27
Q

SYMBOL:
speed

A

m/s

28
Q

SYMBOL:
energy

A

J

*note: 1J = (kg)(m2)/s2

29
Q

OPERATIONS WITH SIGNIFICANT FIGURES

A

addition, subtraction, multiplication and division

30
Q

TRUE OR FALSE:
when two measurements are added or subtracted, the sum or difference MUST HAVE THE SAME NUMBER of decimal places as the measurement with the FEWEST number of decimal places

A

TRUE

31
Q

TRUE OR FALSE:
when two measurements are added or subtracted, the sum or difference MUST NOT HAVE THE SAME NUMBER of decimal places as the measurement with the FEWEST number of decimal places

A

FALSE

32
Q

TRUE OR FALSE:
measurements that are multiplied or divided will FOLLOW the LEAST number of significant figures from the original measurement

A

TRUE

33
Q

TRUE OR FALSE:
measurements that are multiplied or divided will NOT FOLLOW the LEAST number of significant figures from the original measurement

A

FALSE

34
Q

combination of trueness and precision

A

ACCURACY

35
Q

NEARNESS of measurement to the TRUE VALUE

A

TRUENESS

36
Q

NEARNESS of the values of MULTIPLE MEASUREMENTS TO EACH OTHER

A

PRECISION

37
Q

involves the SEPARATION of the SOLID component of a mixture from its LIQUID component; and solids mixed with gases

A

FILTRATION

38
Q

mixture passes through _____ or membrane that enables liquids or gases to pass but solids

A

porous surface

39
Q

separated solids

A

RESIDUE

40
Q

gas without the solid components

A

FILTRATE

41
Q

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

A

DISTILLATION

42
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

43
Q

condensed vapor

A

DISTILLATE

44
Q

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

fixed medium could be a paper, gel, or cellulose

A

CHROMATOGRAPHY

45
Q

PHYSICAL METHODS OF SEPERATION

A

filtration
distillation
chromatography

GENCHEM (10 decks)

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