Emulsions

When oil and water are added together, they form ...

• A solution

• A homogeneous mixture

• A new substance

• Two distinct layers

If you shake a mixture of oil and water vigorously, there will be ...

• tiny oil droplets interspersed throughout the water.

• two liquid layers

• a homogeneous mixture

• a new substance

An emulsion is a special type of mixture made by combining two liquids that normally ... mix.

• do not

• do

Common everyday emulsions include ...

• milk, fresh water, ice cream, and paint.

• milk, mayonnaise, vinegar, and paint.

• milk, mayonnaise, ice cream, and paint.

• milk, mayonnaise, oil, and paint.

Substances known as ... are added to stabilize emulsions.

• emulsifiers

• stabilizers

• solutes

• solvents

All emulsifiers have two parts: ...

• a water-loving head and a oil-fearing tail

• a hydrophilic head and a hydrophobic tail

• a hydrophilic head and a lipophobic tail

• a water-fearing head and a oil-loving tail

When making ice cream, ... is commonly added.

The active emulsifier in ... is called ...

• egg yolk / egg yolk / lecithin

• egg white / egg white / lecithin

• egg yolk / egg yolk / water

• egg white / egg white / water

If we added lecithin to our original oil and water emulsion, its hydrophilic head will prefer to associate with ..., and the hydrophobic tail with the ... droplets.

• oil / water

• water / oil

• water / emusion

• emulsion / oil

Emulsions can also exist as ... droplets in ....

Real life examples include ..., lotions, and facial creams.

• oil / water / margarine

• water / oil / gelatine

• water / oil / margarine

• oil / water / gelatine