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INORGANIC AND ORGANIC CHEMISTRY > MEASUREMENTS > Flashcards

MEASUREMENTS Flashcards

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1
Q

The “Absolute temperature scale” begins at absolute zero and only has positive values

A

Kelvin ( K )

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2
Q

The temperature scale used by science, formally called centigrade, most commonly used scale around the world

A

Celsius ( oC )

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3
Q

Commonly used scale in the U.S. for our weather reports

A

Fahrenheit ( oF )

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4
Q

Refers to reproducibility or how close the measurements are to each other

A

Precision

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5
Q

Refers to how close a measurement is to the real value

A

Accuracy

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6
Q

Values that are either all higher or all lower than the actual value

A

Systematic Error

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7
Q

In the absence of systematic error, some values that are higher and some that are lower than the actual value

A

Random Error

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8
Q

Operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties (of the calibrated instrument or secondary standard) and, in a second step, uses this information to establish a relation for obtaining a measurement result from

A

Calibration

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9
Q

ratio of mass over volume

A

Density

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10
Q

Any characteristic of matter that does not depend on the amount of the substance present

A

Intensive Property

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11
Q

Any characteristic of matter that depends on the amount of matter being measured

A

Extensive Property

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12
Q

The Density of Water is

A

1 g/mL

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13
Q

defined as the mass per unit volume of a substance, and it is a physical property of matter

A

Density

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14
Q

The units of density are commonly expressed as

A

g/cm for solids, g/mL for liquids, and g/L for gases

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15
Q

Your eye must be level with the volume mark and the pipet vertical. If you are looking up at the pipet, the meniscus will be too high when it appears to align with the mark. It you are looking down at the pipet, the meniscus will be too low when it appears to align with the mark

A

Parallax error

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16
Q

the simple average of your replicas

A

The mean

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17
Q

related to the spread in values of replicas of your experiment

A

The standard deviation

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18
Q

The standard deviation of the mean, σ𝑥̅, is also called the

A

estimated standard error

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19
Q

measure of the average kinetic energy of molecules in a substance

A

Temperature

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20
Q

5 types of glasses

A
  1. Soda lime glass
  2. Lead glass
  3. Borosilicate glass
  4. Fused silicate glass (Quartz glass)
  5. Ceramics
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21
Q

A substance that is made from clay and hardened by heat in a furnace maintained at a high temperature

A

Ceramics

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22
Q

Sand is heated until it melts at 1700°C, and the viscous liquid is cooled immediately which produces a transparent solid with an uneven arrangement of atoms. Properties: Cannot expand or contract easily when there are temperature changes. Difficult to be made into different shapes. High melting point.

A

Fused silicate glass (Quartz glass)

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23
Q

Boron oxide (B2O3) and sodium carbonate is added to molten silica. Properties: Able to withstand high temperature and chemical reaction. It does not break easily. High melting point. Transparent to light and infrared ray but no to ultraviolet ray.

A

Borosilicate glass

24
Q

A mixture of lead(II) oxide, sodium oxide and silica, Lead glass of better quality contains a higher percentage of PbO. Properties: High refractive index and density, Glittering and attractive surface, Very transparent.

A

Lead glass

25
Q

Limestone (CaCO3) and sodium carbonate(Na2CO3) are mixed with molten silica and cooled down. Properties: Low melting point, Easily to be shaped(soft glass), Easily broken, Transparent.

A

Soda lime glass

26
Q

If a piece of glassware is manufactured to contain liquids, the volume of the liquid inside will be the amount indicated by the markings on the outside of the glassware

A

TC – To contain

27
Q

If a piece of glassware is manufactured to deliver a specific volume of liquid, the amount indicated on the glassware is correct only once the liquid is dispensed into another container.

A

TD – To deliver

28
Q

used to rinse pieces of glassware and to add small quantities of water

A

Wash Bottle

29
Q

used to measure small amounts of liquid very accurately. Never pipet by mouth use pipetting aids

A

Volumetric Pipet

30
Q

used to secure glassware to a ring standard

A

Utility Clamp

31
Q

used to prepare solutions to an accurate volume

A

Volumetric Flask

32
Q

used to measure temperature in celsius

A

Thermometer

33
Q

used to light a bunsen burner

A

Striker

34
Q

used to hold and mix liquids

A

Test Tube

35
Q

used to hold a test tube, particularly when hot

A

Test Tube Clamp

36
Q

used to hold several test tubes at one time

A

Test tube rack

37
Q

used to transfer solids

A

Scoopula

38
Q

used for stirring and mixing

A

Stirring Rod

39
Q

used to draw liquids into a pipet

A

Pipet Bulb

40
Q

used with a ring stand to hold glassware, such as a beaker or a funnel

A

Ring Clamp

41
Q

used to hold or clamp laboratory glassware and other equipment in place, so it does not fall down or come apart

A

Ring Stand

42
Q

used to heat liquids for evaporation

A

Evaporating Dish

43
Q

used to pick up or hold small objects

A

Forceps

44
Q

used to transfer liquids or fine-grained materials into containers with small openings. Also used for filtration

A

Funnel

45
Q

used to measure a precise volume of a liquid

A

Graduated Cylinder

46
Q

used to crush and grind materials

A

Mortar and pestle

47
Q

used to hold crucibles

A

Crucible tongs

48
Q

used to hold and mix chemicals. The small neck is to facilitate mixing without spilling

A

Erlenmeyer Flask

49
Q

used for dispensing an accurate volume of a liquid

A

buret

50
Q

used to support a crucible during heating

A

Clay Triangle

51
Q

used for holding chemicals during heating to very high temperature

A

Crucible

52
Q

used to hold crucibles

A

Crucible Tongs

53
Q

used for measuring mass

A

balance

54
Q

used to hold, mix, and heat liquids

A

Beaker

55
Q

used to pick up beakers

A

Beaker Tong

56
Q

frequently used as a heat source in the absence of flammable materials

A

Bunsen Burner

INORGANIC AND ORGANIC CHEMISTRY (7 decks)

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