# HV3 C1 Materials and substances (2)

H1 Materials and
substances
Lesson 2: Recap Mixtures and Separation Methods

NOVA 3HV
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Slide 1: Tekstslide
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In deze les zitten 23 slides, met interactieve quizzen en tekstslides.

Lesduur is: 30 min

## Onderdelen in deze les

H1 Materials and
substances
Lesson 2: Recap Mixtures and Separation Methods

NOVA 3HV

#### Slide 1 -Tekstslide

Class Goals Today
• Review the particle model
• Review pure substances and mixtures
• Review separation methods
• Class Quiz - What do you remember?

#### Slide 2 -Tekstslide

The particle model
• Macro level properties depend on micro level molecules
• Phase transitions like melting and boiling originate from moving molecules

#### Slide 3 -Tekstslide

Pure substances and mixtures
• What is a pure substance?
• Mixtures; heterogeneous, homogeneous
• Solutions, suspensions, emulsions
• Composition, mass percentage calculations

#### Slide 4 -Tekstslide

Calculations
Brass is a mixture of copper and zinc.
400 g of brass contains 236 g of copper.
The masspercent of copper in messing is ...........%

Stainless steel contains 8 masspercent nickel and 18% chromium. How much nickel  is present in a slab of steel weighing 50 kg.

In deze plaat zit
kg nikkel.

#### Slide 5 -Tekstslide

One more...
Seawater contains 3% salt. How much seawater (in kg) do I need to obtain 12 kg of salt?

#### Slide 6 -Tekstslide

Separation Methods
• Filtration
• Sedimentation and decanting
• Centrifugation
• Evaporation
• Distillation
• Extraction

Quiz !!!

#### Slide 8 -Tekstslide

A liquid with small pieces of a solid substance floating in it. Each granule consists of a huge number of molecules.

#### Slide 9 -Open vraag

Materials of natural origin such as bone, wood and stone.

#### Slide 10 -Open vraag

The mass of a material or substance per unit volume.

#### Slide 11 -Open vraag

This substance contains several pure substances mixed together and so there are several types of molecules.

#### Slide 12 -Open vraag

How well substances and materials conduct heat or electricity.

#### Slide 13 -Open vraag

Separation method based on differences in solubility in which you dissolve substances from a mixture into the xxxxx agent.

#### Slide 14 -Open vraag

What tells you the ratios in which substances are present in a mixture.

#### Slide 15 -Open vraag

A mix of materials used to achieve better material properties.

#### Slide 16 -Open vraag

Separation method based on differences in density.

#### Slide 17 -Open vraag

Separation method based on differences in particle size.

#### Slide 18 -Open vraag

A substance that only contains a single type of molecule at the micro level.

#### Slide 19 -Open vraag

This mixture is made up entirely of separate molecules.

#### Slide 20 -Open vraag

Absorbing water or soluble in water.

#### Slide 21 -Open vraag

A liquid in which another substance is present. That other substance has been broken up into individual molecules.

#### Slide 22 -Open vraag

The state of matter for a substance: solid, liquid or gaseous.