soap

Question 1

what is the name for vegetable oil in saponification

Answer 1

glyceryl tristerate

Question 2

what is the base used in base hydrolysis

Answer 2

NaOH

Question 3

what is another name for saponification

Answer 3

base hydrolysis

Question 4

what is another name for base hydrolysis

Answer 4

saponification

Question 5

what is the name for soap

Answer 5

sodium isterate

Question 6

what is the other product in saponification other than sodium istearate

Answer 6

glycerol

Question 7

what is used as a solvent for vegetable oil in saponification

Answer 7

ethanol

Question 8

what is the purpose of ethanol during saponification

Answer 8

solvent for the vegetable oil

Question 9

what is used to ensure even boiling during saponification

Answer 9

anti bumping chips

Question 10

what is the purpose of anti bumping chips

Answer 10

ensure even boiling

Question 11

what is there molecular formula for soap

Answer 11

C17H35COONa

Question 12

what is the non polar part of soap

Answer 12

C17H35

Question 13

what is the polar part of soap

Answer 13

COO-NA+

Question 14

is C17H35 polar or non polar in soap

Answer 14

non polar

Question 15

Is COO-Na+ polar or non polar in soap

Answer 15

polar

Question 16

what is the purpose of the polar part of soap

Answer 16

dissolves sweats and salts

Question 17

what is the purpose of the non polar part of soap

Answer 17

dissolves oil

Question 18

what are the 2 processes involved in saponification

Answer 18

refluxation and distillation

Question 19

what kind of reaction is saponification

Answer 19

substitution

Question 20

why is refluxing important during saponification!!!!!!!!!!!!

Answer 20

ensure all organic reactions go to completion
keep contents of the pear shaped flask at a constant boiling point without vapour loss

Question 21

why is a liebeg condenser used during refluxation of soap

Answer 21

hot vapour gets condensed back into a liquid

Question 22

why does distillation occur when making soap

Answer 22

to distill off the ethanol

Question 23

how does distillation occur during saponification

Answer 23

add soap precipitate into a brine solution

Question 24

what’s brine

Answer 24

concentrated solution of salt and water

Question 25

what does the brine solution contain during distillation of soap when soap precipitate has been added

Answer 25

ethanol, vegetable oil, glyceryl, unreacted NaOH

Question 26

what occurs after distillation during base hydrolysis

Answer 26

filtration

Question 27

during filtration of soap, what is left in the filter paper and what is the filtrate

Answer 27

filter paper = soap residue beaker = ethanol, NaOH, glyceryl

Question 28

why is soap washed with ice cold H2O

Answer 28

to remove excess NaOH which is corrosive

Question 29

what must you do after filtration of soap

Answer 29

wash soap with ice cold water and leave to air dry stopper and shake in test tube of deionised water

Question 30

purpose of the brine solution

Answer 30

to isolate the soap as it is insoluble in the brine solution

Question 31

Why was it necessary to remove the ethanol after reflux?

Answer 31

To maximise yield and allow the soap to precipitate

Question 32

What is the location of the glycerol at the end of soap preparation

Answer 32

in the filtrate

Question 33

How is the soap isolated

Answer 33

vacuum filtration