View
123
Download
3
Category
Tags:
Preview:
DESCRIPTION
Emulsions & Colloids. Mixtures. Combo of 2 or more pure substances Physically combined NOT chemically combined Each substance retains its own identity and properties. Mixtures. Variable composition No unique properties Ex: sugar and sand mixed together Separated by physical methods - PowerPoint PPT Presentation
Citation preview
Emulsions & Emulsions & ColloidsColloids
MixturesMixtures•Combo of 2 or more pure substances
•Physically combined NOT chemically combined
•Each substance retains its own identity and properties
MixturesMixtures• Variable composition• No unique properties
• Ex: sugar and sand mixed together• Separated by physical methodsphysical methods• May be homogeneous or heterogeneous
TypesTypes of Mixtures of Mixtures• HomogeneousHomogeneous• HeterogeneousHeterogeneous
•Homogeneous: constant composition throughout, single phase
Homogeneous mixtures = solutions
Air
Homogeneous Solutions:
Drink mixWindow cleaner
•Heterogeneous: See boundary or regions that look different
Heterogenous mixtures = suspensions
Heterogeneous mixtures:cereal/granite
Heterogeneous mixture: ice water
Suspension subtypes:
•Emulsions:•2+ liquids that don’t mix
•Colloids:•contain very tiny particles
•evenly dispersed but don’t dissolve
•big enough to scatter light
Colloid: milk
Suspension: smoke/smog
Emulsion:
oil & vinegar
Hints for MixturesHints for Mixtures• Solutions transmit light
• No particles big enough to scatter light • Look translucent (can see-through)
• Suspensions scatter light• Particles big enough to scatter light• Settle upon standing• Look cloudy (can’t see-through)
Where does this liquid fit?
Homogeneous?
Heterogeneous?
Recommended