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ANACHEM PRELIMS > INTRODUCTION TO ANALYTICAL CHEMISTRY > Flashcards

INTRODUCTION TO ANALYTICAL CHEMISTRY Flashcards

1
Q

It is the science of obtaining, processing, and communicating information about the composition and structure of matter.

A

Analytical Chemistry

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2
Q

contributes in the development of systematic elemental analysis and systematized organic analysis based on the specific reasons of functional group

A

Just von Leibig

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3
Q

discovered Rubidium and Cesium in 1860
Flame Emission Spectrometry

A

Robert Bunsen and Gustav Kirchhoff

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4
Q

2 NATURE OF ANALYTICAL CHEMISTRY

A

Qualitative
Quantitative

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5
Q

reveals the identity of the elements and compounds in a sample

A

Qualitative

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6
Q
  • indicates the amount of each substance in a sample
A

Quantitative

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7
Q

are the components of a sample that are determined

A

Analytes

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8
Q
  • conforms to the minimum standards set forth by the Reagent Chemical Committee
  • it has a maximum limit of impurities ( most high purity)
A

Reagent Grade

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9
Q

a highly pure and stable chemicals reagent used to prepare standard solutions

A

Primary - Standard Grade

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10
Q

used for specific applications especially when advanced and hi-tech instruments are involve

A

Special - Purpose Reagent Chemicals

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11
Q

is frequently difficult to control because of the tendency of some solutions to overheat locally

A

Evaporation

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12
Q

is the sudden, often violent boiling that tends to separate solutions out of its container

A

BUMPING

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13
Q

is the oxidation of the organic constituents of a sample with oxidizing reagents such as nitric acid, sulfuric acid, hydrogen peroxide, aqueous bromine or combination of these reagent

A

WET ASHING-

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14
Q

has a maximum capacity that ranges from 1g to several kilograms and precision at maximum capacity of at least 1 part in 10^5

A

Analytical Balance

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15
Q

is the most common type of analytical balance and it has a maximum load of 160 to 200g and a precision of 0.1 mg

A

Macrobalance

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16
Q

has a maximum load of 10 to 30g and a precision of 0.01 mg

A

Semimicroanalytoical Balance

17
Q

has a maximum load of 1 to 3g and a precision of 0.001 mg or 1 microgram

A

Microanalytical Balance

18
Q

for freezers and refrigerators

A

Total Immersion

19
Q

for water bath and heating blocks

A

Partial Immersion

20
Q

Serve only as containers

A

Simple Crucible

21
Q

used principally to convert a precipitate into a suitable weighing form

A

porcelain, aluminum oxide, silica and platinum crucible

22
Q

are used as containers for the high-temperature fusion of samples that are not soluble aqueous reagents

A

nickel, iron, silver and gold crucible

23
Q

-serve not only as containers but also as filters
vacuum is used to hasten the filtration

A

Filtering Crucible

24
Q

manufactured in fine, medium and coarse porosities Upper temperature limit is usually about 200 deg Celsius

A

Sintered Glass ( Fritted Glass)

25
Q

has perforated bottom that supports a fibrous mat

A

Gooch Crucible

26
Q

is an important filtering medium
ashless paper is manufactured from cellulose fiber treated with hydrochloric acids

A

Filter Paper

27
Q

electrically heated and capable of maintaining a constant temperature to within 1 deg celsius

A

Oven

28
Q

are currently quite popular and they greatly shorten drying cycles

A

Microwave laboratory ovens

29
Q

can be used to dry precipitate that has been collected on ashless paper and to burn the paper as well completed by ignition at an elevated temperature

A

Ordinary heat lamp

30
Q

are convenient source of intense heat Heating Equipment

A

Burners

31
Q

Accurate known volume

  • Volumetric or transfer pipet delivers single fix volume between 0.5 to 200 ml
  • Measuring pipets are calibrated to convenient units to permit delivery of any volume up to max capacity ranging from 0.1 to 25 m
A

Pipettes

32
Q

Deliver adjustable microliter volume of liquid
known and adjustable volume of air is displaced from the disposable plastic tips

A

Hand-held Eppendorf Micropipettes

33
Q

enable the analyst to deliver any volume up to their maximum capacities
It has greater precision than a pipette
Consist of calibrated tubes and valve by which flow titrant is controlled

A

Burettes

34
Q

capacity range from 5 ml to 5 L
Used in preparing standard solutions and dilution of samples to a fixed volume

A

Volumetric Flask

35
Q

is the apparent displacement of a liquid level or of a pointer as an observer changes position or viewed in the wrong angle or position

A

Parallax

36
Q

is the curved surface of a liquid at its interface with the atmosphere

A

Meniscus

37
Q

lower meniscus

A

Clear liquid

38
Q

upper meniscus

A

Colored/ dark liquid

ANACHEM PRELIMS (3 decks)

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