H1.4 Types of mixtures ( and pH)

• Scheikunde
• Middelbare school
• havo
• Leerjaar 3

Types of mixtures (and pH)

Paragraaf 1.4

Pure substance                      Mixture

Type of mixtures

- Solution

- Suspension

- Emulsion

Solution = clear

Suspension = cloudy (turbid)

Emulsion =

cloudy (turbid) mixture
of liquids

blue = solution

red = emulsion

white = suspension

Solution:        clear liquid, solid or liquid in solvent

        

Suspension: cloudy mixture of solid in liquid

                   

Emulsion:      cloudy mixture of two liquids

                   

Emulsifier (prevents unmixing)

                                                                                    egg yolk (in mayonaise)

Homogeneous or heterogeneous

What type of mixture is this?

1. Emulsion
2. Solution
3. Emulsifier
4. Suspension

What type of mixture is this?

1. solution
2. suspension
3. emulsion

What substance is an emulsifier?

1. Water
2. Cream
3. Soap
4. Oil

A permanent emulsion is a
mixture of ...

1. Water and salt
2. water, oil and emulsifier
3. Oil and gasoline
4. water and oil

a suspension is a ... mixture

1. heterogeneous
2. homogeneous

Acids, Bases and pH scale

Learning objective(s):

I can explain what pH value means.

I can explain what acid-, basic- and neutral solutions are.

How you can determine it.

Calculate the pH when you dilute a solution.

Acids, Bases and pH scale

Learning objective(s):

I can explain what pH value means.

I can explain what acid-, basic- and neutral solutions are.

How you can determine it.

Calculate the pH when you dilute a solution.

What does PH indicate?

1. the acidity
2. adhesion capacity
3. whether it is a liquid, solid or gas
4. the neutrality

The higher the pH, the...

1. ...more acidic the solution
2. ...less acidic the solution

Ammonia has a pH of 11.
Rainwater has a pH of 5.
What is true?

1. They are both sour
2. They are both basic
3. Ammonia is acidic, rainwater is basic
4. Ammonia is basic, rainwater is acidic