Soaps And Emulsions

Question 1

What is the reaction to make soaps

Answer 1

Fat/oil + Alkaline -> glycerol + soap

Question 2

What does the alkaline do (NaOH)

Answer 2

Turns the fatty acid created into a soap

Question 3

What type of reaction is this

Answer 3

Alkaline hydrolysis

Question 4

Why do fats and oils not dissolve in water

Answer 4

They are non polar

Question 5

Soaps have a ____ head and a ____ tail

Answer 5

Polar/hydrophilic head
Non polar/ hydrophobic tail

Question 6

What is the first step of how soaps work

Answer 6

The soap molecules (tail) can dissolve in the grease causing the neg charge to be pointing out

Question 7

What is the next step of how soaps work

Answer 7

Mixing causes globules to form. The beg charges repel each other and the grease is suspended in the air. These are now attracted to water and they get washed away

Question 8

What is an emulsion

Answer 8

Is a liquid containing 2 different things mixed together

Question 9

What is an emulsifier

Answer 9

A compound which brings two substances together which would normally separate

Question 10

How do you make an emulsifier used in food

Answer 10

Reacting edible oils and glycerol - but only makes one or two fatty acid groups rather then 3