Analytical Chem

Question 1

Reagent used to indicate redox titrations

Answer 1

Iodine Reagent

Question 2

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

Answer 2

Fehling solution

Question 3

Supplementary to the Tollen’s reagent test

Answer 3

Fehling solution

Question 4

Reagent used to test for the presence of carbohydrates

Answer 4

Molisch Reagent

Question 5

Reagent used in silver mirror test

Answer 5

Tollens Reagent

Question 6

Indicator for acid-base titration

Answer 6

Phenolphthalein Indicator

Question 7

Indicator for iodine test

Answer 7

Starch Solution

Question 8

Reagent used to detect the presence of soluble proteins

Answer 8

Millons Reagent

Question 9

Reagent used in preparation of alkyl or alkenyl halides

Answer 9

Grignard reagents

Question 10

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

Answer 10

Spectophotometer

Question 11

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

Answer 11

Liquid Chromatography

Question 12

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

Answer 12

Gas Chromatography

Question 13

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

Answer 13

Thin-Layer Chromatography

Question 14

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

Answer 14

Galvanic Cell

Question 15

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

Answer 15

Electrolytic Cell

Question 16

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

Answer 16

Global Harmonized System

Question 17

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

Answer 17

Material Safety Data Sheet

Question 18

Funnel used for vacuum filtration

Answer 18

Buchner Funnel

Question 19

GHS consists of three major hazard groups :

Answer 19

Physical hazards.
Health hazards.
Environmental hazards.

Question 20

Acute toxicity, hazard categories 1 and 2: H300

Answer 20

Fatal if swallowed

Question 21

Acute toxicity, hazard category 3: H301

Answer 21

Toxic if swallowed

Question 22

Acute toxicity, hazard category 4: H302

Answer 22

Harmful if swallowed

Question 23

Keep out of reach of children.

Answer 23

P102

Question 24

P240 Ground/bond container and receiving equipment.

Answer 24

P240

Question 25

P361 Remove/Take off immediately all contaminated clothing.

Answer 25

P361

Question 26

NFPA color indicating the level of health hazard

Answer 26

blue

Question 27

NFPA color indicating flammability

Answer 27

red

Question 28

NFPA color indicating physical hazard

Answer 28

orange

Question 29

NFPA color indicating personal protection

Answer 29

white

Question 30

3 types of error

Answer 30

Systematic, Random, and Blunder

Question 31

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

Answer 31

Systematic errors

Question 32

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

Answer 32

Random error

Question 33

an outright mistake error

Answer 33

Blunder

Question 34

Parallax error is what type of error

Answer 34

Systematic

Question 35

Systematic errors lead to a lack of?

Answer 35

Accuracy in measurment

Question 36

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.

Answer 36

Mohr's Method

Question 37

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

Question 38

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

Answer 38

Red

Question 39

Color Change of EDTA titration

Answer 39

blue to pink

Question 40

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.

Answer 40

Volhard Method

Question 41

Indicator in Mohrs Method

Answer 41

Potassium Chromate

Question 42

Which Colour precipitate appear at the end point in Volhard method

Answer 42

red

Question 43

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

Answer 43

Fajans method

Question 44

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.

Answer 44

Kjeldahl method

Question 45

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

Answer 45

AgCl

Question 46

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

Answer 46

AgNO3

Question 47

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

Answer 47

BaSO4

Question 48

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

Answer 48

BaCl2

Question 49

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

Answer 49

Diphenylamine, colorless to blue-violet

Question 50

How to identify presence of carbonate ion in the solution

Answer 50

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

Question 51

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

Answer 51

ammonium molybdate (NH4)2MoO4

Question 52

What is the color of a copper precipitate

Answer 52

Blue

Question 53

What is the color of an Iron II precipitate

Answer 53

Dirty Green

Question 54

What is the color of an Iron III precipitate

Answer 54

Reddish Brown

Question 55

What is the color of a manganese precipitate

Answer 55

pale pink

Question 56

What is the color of a nickel precipitate

Answer 56

green

Question 57

``` Identify the colors of these precipitates Cr(OH)3 Mn(OH)2 Fe(OH)2 Fe(OH)3 ```

Answer 57

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

Question 58

``` Identify the colors of these precipitates Co(OH)2 Ni(OH)2 Cu(OH)2 Zn(OH)2 ```

Answer 58

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

Question 59

``` Identify the colors of these precipitates HgS(s) Sb2S3(s) CdS(s) FeS(s) SnS(s) ```

Answer 59

``` HgS(s) - black Sb2S3(s) - orange CdS(s) - yellow FeS(s) - black SnS(s) - yellow brown ```

Question 60

``` Identify the colors of these precipitates SnS2(s) CuS(s) NiS(s) MnS(s) ```

Answer 60

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

Question 61

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

Answer 61

(NH4)2HPO4

Question 62

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

Answer 62

H2PtCl6

Question 63

What is added to identify presence of Fe3+ ion

Answer 63

NH3