2.2 Substances Mixtures _ 2 (brushup)

• Natuurkunde / Scheikunde
• Middelbare school
• havo
• Leerjaar 2

Planning

• Short Revision 2.1 + 2.2

• Explanation 2.2

• Let's work

what 3 types of mixtures were explained last time

At the end of this lesson:

You will know:

• What seperation methods are

You will be able to:

• Explaine how seperation methods work
  

H2.2

• Pure substances

       Consist of 1 substance, 

       1 kind of molecules

• Mixtures

       Consist of 2 or more substance, 

       2 or more kind of molecules

H2.2

• Mixtures

• 3 Types of mixtures

H2.2

• Mixtures

• 3 Types of mixtures

1. Solution
2. Suspension
3. Emulsion

Solution

• Solvent
• What is a solute/ dissolved substance?
  

• Clear, sometimes colored 

Suspension

• A liquid with a floating fine powder
• The powder does not disolve!!
  

• Cloudy, colored 

Emulsion

• A cloudy mixture of two liquids,
  
• The liquids does not disolve!!
  

• Cloudy, colored 

• Need an emulsifier to mix
  

Explanation

• Seperating mixtures

• Using: seperation methods

• Based on difference in properties (of each substance)
  

Explanation

• Seperation methods:
  

1. Settle and pouring 
2. Centrifugation (spinning) 
3. Filtration 
4. Evaporation 
5. Distillation 
6. (Extraction) 
7. (Adsorption) 
   

Explanation

• Seperation methods:

• Settle and pouring 
• Based on difference in density

Explanation

• Seperation methods:

• Centrifugation (spinning) 
• Based on difference in density

Explanation

• Seperation methods:

• Filtration 
• Based on difference in particle size

Explanation

• Seperation methods:

• Evaporation 
• Based on difference in boiling point

Explanation

• Seperation methods:

• Distillation 
• Based on difference in boiling point

Let's Work

- H2.2 (p. 19+20 -> Not Extraction and filtration)

- Make the following exersises: 

   2.2: 11, 12, 15,