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Chemical Technician > Analytical Chem > Flashcards

Analytical Chem Flashcards

1
Q

Reagent used to indicate redox titrations

A

Iodine Reagent

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2
Q

Solution used to differentiate between water-soluble carbohydrate and ketone functional groups, and as a test for reducing sugars and non-reducing sugars

A

Fehling solution

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3
Q

Supplementary to the Tollen’s reagent test

A

Fehling solution

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4
Q

Reagent used to test for the presence of carbohydrates

A

Molisch Reagent

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5
Q

Reagent used in silver mirror test

A

Tollens Reagent

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6
Q

Indicator for acid-base titration

A

Phenolphthalein Indicator

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7
Q

Indicator for iodine test

A

Starch Solution

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8
Q

Reagent used to detect the presence of soluble proteins

A

Millons Reagent

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9
Q

Reagent used in preparation of alkyl or alkenyl halides

A

Grignard reagents

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10
Q

An instrument used that measures the amount of light absorbed by a sample

A

Spectophotometer

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11
Q

Used to analyze metal ions and organic compounds in solutions. It uses liquids that may incorporate hydrophilic, insoluble molecules

A

Liquid Chromatography

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12
Q

Used to analyze volatile gases. In this test, helium is used to move the gaseous mixture through a column of absorbent material.

A

Gas Chromatography

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13
Q

Uses an absorbent material on flat glass plates. This is a simple and rapid method to check the purity of the organic compound

A

Thin-Layer Chromatography

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14
Q

Type of electrochemical cell that produces electrical energy in a “spontaneous” reaction

A

Galvanic Cell

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15
Q

Type of electrochemical cell that requires electrical energy to occur in a non spontaneous reaction

A

Electrolytic Cell

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16
Q

Defines and classifies the hazards of chemical products, and communicates health and and safety information on labels and safety data sheet

A

Global Harmonized System

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17
Q

A document that provides workers with procedures for safety handling or working with a particular substnace

A

Material Safety Data Sheet

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18
Q

Funnel used for vacuum filtration

A

Buchner Funnel

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19
Q

GHS consists of three major hazard groups :

A

Physical hazards.
Health hazards.
Environmental hazards.

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20
Q

Acute toxicity, hazard categories 1 and 2: H300

A

Fatal if swallowed

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21
Q

Acute toxicity, hazard category 3: H301

A

Toxic if swallowed

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22
Q

Acute toxicity, hazard category 4: H302

A

Harmful if swallowed

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23
Q

Keep out of reach of children.

A

P102

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24
Q

P240 Ground/bond container and receiving equipment.

A

P240

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25
Q

P361 Remove/Take off immediately all contaminated clothing.

A

P361

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26
Q

NFPA color indicating the level of health hazard

A

blue

27
Q

NFPA color indicating flammability

A

red

28
Q

NFPA color indicating physical hazard

A

orange

29
Q

NFPA color indicating personal protection

A

white

30
Q

3 types of error

A

Systematic, Random, and Blunder

31
Q

errors that are due to identified causes and can, in principle, be eliminated. Errors of this type result in measured values that are consistently too high or consistently too low

A

Systematic errors

32
Q

errors that are positive and negative fluctuations that cause about one-half of the measurements to be too high and one-half to be too low. Sources of this type of error cannot always be identified

A

Random error

33
Q

an outright mistake error

A

Blunder

34
Q

Parallax error is what type of error

A

Systematic

35
Q

Systematic errors lead to a lack of?

A

Accuracy in measurment

36
Q

A method in which alkaline or alkaline earth chlorides react with silver nitrate in the presence of a few drops of potassium chromate solution as an indicator for chloride determination.

A

Mohr’s Method

37
Q

Potassium chromate is used as an indicator in the Mohrs method for determination of chlorides

A
38
Q

Potassium chromate is used as an indicator in the Mohrs method for the determination of chlorides. What color is the end point

A

Red

39
Q

Color Change of EDTA titration

A

blue to pink

40
Q

an indirect or back titration method in which an excess of a standard solution of silver nitrate is added to a chloride containing sample solution. The excess silver is then back titrated using a standardized solution of potassium or ammonium thiocyanate with ferric ion as an indicator.

A

Volhard Method

41
Q

Indicator in Mohrs Method

A

Potassium Chromate

42
Q

Which Colour precipitate appear at the end point in Volhard method

A

red

43
Q

In this method dichlorofluorescein is used as an indicator; the end-point is marked by the green suspension turning pink

A

Fajans method

44
Q

involves a three-step approach to the quantification of protein: digestion, distillation, and titration. Digestion of organic material is achieved using concentrated H2SO4, heat, K2SO4 (to raise the boiling point), and a catalyst (e.g., selenium) to speed up the reaction.

A

Kjeldahl method

45
Q

HNO3 will dissolve these silver salts except (AgCl, Ag2CO3, Ag2SO4, Ag3PO4)

A

AgCl

46
Q

For chloride determination what solution is added to have a chloride precipitate

A

AgNO3

47
Q

HNO3 will dissolve these sulfates salt except (BaSO4, BaCO3, Ba3(PO4)2)

A

BaSO4

48
Q

For sulfate determination what solution is added to have a sulfate precipitate

A

BaCl2

49
Q

What is added to identify presence of nitrate ion in the solution, what is the color change upon adding this compound

A

Diphenylamine, colorless to blue-violet

50
Q

How to identify presence of carbonate ion in the solution

A

Add acid to the solution and if there are bubbles forming then there is carbonate ion in the solution. The gas produced is CO2

51
Q

What is added to identify presence of orthophosphate ion (HPO4 2-) in the solution, what is the color of the precipitate

A

ammonium molybdate (NH4)2MoO4

52
Q

What is the color of a copper precipitate

A

Blue

53
Q

What is the color of an Iron II precipitate

A

Dirty Green

54
Q

What is the color of an Iron III precipitate

A

Reddish Brown

55
Q

What is the color of a manganese precipitate

A

pale pink

56
Q

What is the color of a nickel precipitate

A

green

57
Q 
Identify the colors of these precipitates
Cr(OH)3 
Mn(OH)2
Fe(OH)2 
Fe(OH)3
A

Cr(OH)3 - green
Mn(OH)2 - yellow white
Fe(OH)2 - green
Fe(OH)3 - brown

58
Q 
Identify the colors of these precipitates
Co(OH)2 
Ni(OH)2 
Cu(OH)2
Zn(OH)2
A

Co(OH)2 - pink
Ni(OH)2 - green
Cu(OH)2 - blue
Zn(OH)2 - white

59
Q 
Identify the colors of these precipitates
HgS(s)
Sb2S3(s)
CdS(s)
FeS(s)
SnS(s)
A 
HgS(s) - black
Sb2S3(s) - orange
CdS(s) - yellow
FeS(s) - black
SnS(s) - yellow brown
60
Q 
Identify the colors of these precipitates
SnS2(s)
CuS(s)
NiS(s)
MnS(s)
A

SnS2(s) - yellow
CuS(s) - black
NiS(s) - black
MnS(s) - pink

61
Q

What is added to identify presence of Mg 2+ ion in the solution

A

(NH4)2HPO4

62
Q

What is added to identify presence of K+ ion in the solution

A

H2PtCl6

63
Q

What is added to identify presence of Fe3+ ion

A

NH3

Chemical Technician (2 decks)

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