Experiment #12: QUALITATIVE ANALYSIS OF LIPIDS

Question 1

Acrolein test

Answer 1

Test for the presence of glycerol in a molecule

Question 2

A strong acid and a strong dehydrating reagent

Answer 2

Potassium bisulfate

Question 3

When potassium bisulfate is heated with fat

Answer 3

Hydrolysis occurs

Question 4

The glycerol produced is dehydrated to form

Answer 4

Acrolein

Question 5

General formula of Acrolein

Answer 5

CH2=CHCHO

Question 6

The reaction between ______ and _________ results in _________

Answer 6

Glycerol, potassium hydrogen sulfate (potassium bisulfate), acrolein formation

Question 7

The acrolein formation is characterized physically by the release of

Answer 7

Pungent smell

Question 8

Has alcohol functional group

Answer 8

Glycerol

Question 9

Also called glycerine

Answer 9

Glycerol

Question 10

Characteristics of glycerol

Answer 10

Colorless, odorless, viscous liquid, sweet tasting, non-toxic

Question 11

Glycerol backbone found in lipids

Answer 11

Glycerides

Question 12

Glycerol( positive control)

Answer 12

Positive with glycerol

Question 13

Coconut oil

Answer 13

Positive with glycerol

Question 14

Canola oil

Answer 14

Positive with glycerol

Question 15

Butter

Answer 15

Positive with glycerol

Question 16

Lard

Answer 16

Positive with glycerol

Question 17

Test to determine the unsaturation of the oil (with atleast one double bond)

Answer 17

Bromine test

Question 18

2 types of lipids

Answer 18

Saturated & Unsaturated

Question 19

Saturated

Answer 19

Solid at room temperature

Question 20

Liquid at room temperature

Answer 20

Unsaturated

Question 21

Higher is the degree of unsaturation

Answer 21

Unsaturated

Question 22

Lower is the temperature to liquefy it

Answer 22

Unsaturated

Question 23

______ can react with_____ like_____ or _____ due to the presence of

Answer 23

Unsaturated fatty acid, halogens, bromine, iodine, double bonds

Question 24

Bromine goes into the solution forming a______

Answer 24

Dibromide

Question 25

If there is presence of double bonds, the bromine solution will______

Answer 25

Decolorize

Question 26

Absence of double bonds, it imparts its______

Answer 26

Own colors

Question 27

If your sample contains ______, it will ______ with _____ and the ____color of bromine will _______

Answer 27

no double bonds, not react, bromine, yellow, not disappear

Question 28

Even if only ____ drop of bromine is added. If the sample contains _____ bonds, it will react with the added bromine and the ______ color will_____

Answer 28

One, double, yellow, disappear

Question 29

The _____ double bonds present in the sample , the more____ will be needed to react with the sample

Answer 29

more, bromine

Question 30

The ____ color of bromine remains in the solution when all the double bonds have_____

Answer 30

yellow, reacted

Question 31

Oleic acid

Answer 31

2 drops of iodine, unsaturated

Question 32

3 drops of iodine, saturated

Answer 32

Coconut oil

Question 33

Canola oil

Answer 33

2 drops of iodine, unsaturated

Question 34

18 drops of iodine, saturated

Answer 34

Butter

Question 35

20 drops of iodine, saturated

Answer 35

Lard

Question 36

Has one double bonds

Answer 36

Oleic acid

Question 37

One double bonds

Answer 37

Canola oil

Question 38

Unsaturated fats are____ than saturated fats

Answer 38

Healthier

Question 39

Benefits of unsaturated fats

Answer 39

Improve blood cholesterol levels, ease inflammation, stabilize heart rhythms

Question 40

Saturated fats can cause ______, which increases the risk of_______ and _____

Answer 40

Bad LDL cholesterol, heart disease, stroke

Question 41

Saturated fats are _____ and can cause fatty deposits in blood vessels

Answer 41

Solid

Question 42

Fatty Acids

Answer 42

Long chain of carboxylic acids (unbranched)

Question 43

General formula of lauric acid

Answer 43

CH3 (CH2)10COOH

Question 44

Major component of coconut oil

Answer 44

Lauric acid

Question 45

Lauric acid is ____ fatty acid

Answer 45

Saturated

Question 46

Formic acid

Answer 46

The simplest carboxylic acid

Question 47

Secreted by ants and bees

Answer 47

Formic acid

Question 48

All carboxylic acid have_____

Answer 48

COOH

Question 49

Carboxylic acid that can be found at home

Answer 49

Vinegar

Question 50

Organic acid

Answer 50

CH3 COOH

Question 51

a chemical reaction that occurs when a vegetable oil or animal fat (triglycerides, ester) mixed with a strong alkali (NaOH, KOH)

Answer 51

Saponification

Question 52

The products of the reaction of saponification

Answer 52

Soap(fatty acid and salt) and glycerol (free alcohol)

Question 53

The soap produced can be_____ by adding ______ solution, if necessary

Answer 53

Precipitated, concentrated sodium chloride

Question 54

gives "hard soap"

Answer 54

Sodium hydroxide (NaOH)

Question 55

gives "soft" soap or liquid soap because of its greater solubility

Answer 55

Potassium hydroxide (KOH)

Question 56

Soaps are______,_______,_____ and even can lower the surface__________

Answer 56

Cleansing agents, surfactants, emulsifiers, tension of water

Question 57

Mineral salts of fatty acids

Answer 57

Soap

Question 58

The soap is _____ in water but _____ in ether

Answer 58

Soluble, Insoluble

Question 59

Soap works on ________ of oils and fats in the water as it works to reduce the _______ of the solution

Answer 59

Emulsification, attraction surface