Mixtures - PowerPoint PPT Presentation

About This Presentation
Title:

Mixtures

Description:

Mixtures Mixtures Combo of 2 or more pure substances Physically combined NOT chemically combined Each substance retains its own identity and properties Mixtures ... – PowerPoint PPT presentation

Number of Views:588
Avg rating:3.0/5.0
Slides: 19
Provided by: wappin98
Category:

less

Transcript and Presenter's Notes

Title: Mixtures


1
Mixtures
2
Mixtures ? Substances separated by physical
methods Compounds ? Substances separated by
chemical methods
3
Mixtures
  • Combo of 2 or more pure substances
  • Physically combined NOT chemically combined
  • Each substance retains its own identity and
    properties

4
Mixtures
  • Variable composition
  • No unique properties
  • Ex sugar and sand mixed together
  • Separated by physical methods
  • May be homogeneous or heterogeneous

5
Types of Mixtures
  • Heterogeneous See boundary or regions that look
    different
  • Ex
  • colloids
  • suspensions
  • ice water
  • granite
  • cereals

6
Heterogeneous mixtures cereal/granite
Colloid milk
Suspension smoke/smog
Heterogeneous mixture ice water
7
  • Homogeneous constant composition throughout,
    single phase
  • Ex
  • Solutions (all 3 phases)
  • Air
  • Windex
  • kool-aid

8
Homogeneous Solutions
Drink mix
Window cleaner
Air
9
Hints for Mixtures
  • Solutions (gas liquid phases) transmit light
  • No particles big enough to scatter light
  • Look translucent (see-through)
  • Suspensions look cloudy scatter light
  • Particles big enough to scatter light
  • Settle upon standing

10
Where does this liquid fit? Homogeneous? Heteroge
neous?
11
Particle Diagrams
Atoms only monatomic element
?
?
Molecules diatomic element
?
?
?
12
Particle Diagrams
  • Molecules
  • triatomic compound

?
?
?
  • Mixture
  • monatomic element
  • diatomic element
  • triatomic compound

13
Conservation of Mass
  • Mass before Mass after
  • atoms before atoms after

14
Separating Mixtures
  • Physically combined
  • Separation based on physical properties
  • Sorting Appearance
  • Filtration Size
  • Distillation Boiling Point
  • Crystallization Solubility
  • Magnet Magnetization
  • Chromatography Travel ability

15
Filter Solid particles can be separated from
liquid
16
Distillation
Used to separate liquids with different boiling
points
17
Paper Chromatograhy
Can separate liquids with different solubilities
18
Crystallization
Can separate solids dissolved in liquids
Write a Comment
User Comments (0)
About PowerShow.com