Soaps, detergents and emulsions ka4
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/11
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
12 Terms
what is a soap
soaps are salts of fatty acids
how are soaps made
alkaline hydrolysis
describe alkaline hydrolysis
fatty acids are neutralised by the alkali to make soaps
what is hard water
water with dissolved metal ions
hard water + soap
scum
why are detergens used in areas of hard water / hard water + Detrergents
no scum is formed
what is an emulsion
small droplets of a hydrophobic liquid in hydrophilic liquid
what are emulsifiers
they stop polar and non polar liquids separating into layers
how are emulsifiers in food made and what is this called
by reacting edible oils and glycerol = partial hydrolysis
structure of soaps
hydrophobic tail which is non polar (non water soluble) and dissolves in grease.
hydrophilic head that is polar and stays in water.
what does the head of a soap look like
O
II
C - O– - Na +
describe the cleaning action of soaps
hydrophobic tails dissolve in grease
hydrophilic heads stay in water
agitation creates micelles and negative charges keep them separated in water