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Ms.Frajman Separating Mixtures Dirty water Oil and Water Saltwate r

Separating Mixtures

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this is another powerpoint for the chemistry unit in Science 14

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Page 1: Separating Mixtures

Ms.Frajman

Separating Mixtures

Dirty water

Oil and Water

Saltwater

Page 2: Separating Mixtures

SettlingDensity causes parts

of the mixture to settle to the bottom.

This process is used during water filtration. Contaminants sink and clearer water is skimmed off.

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Page 3: Separating Mixtures

FiltrationA mixture is passed

through material with many holes. Anything larger than the hole is trapped while the rest of the mixture passes through.

Examples:Dirty water labPrecipitation lab

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Page 4: Separating Mixtures

CrystallizationThe separation

process in which the solvent is evaporated, leaving crystals of solute behind. Examples:

Rock candy Saltwater lab

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Page 5: Separating Mixtures

ChromatographyThis process is mostly

used to identify substances.

As the substance is drawn up the material (e.g., filter paper), it carries the solutes with it.

The least dense are drawn farthest up the filter paper.

Example: Chromatography lab- green

plant pigment

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Page 6: Separating Mixtures

DistillationThe separation process in which the desired

component is evaporated from the solution and collected.

Water is boiled and the steam is collected. As the steam cools, it condenses to form pure water and anything that was dissolved in the water is left behind

When could we have used this method?

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Page 7: Separating Mixtures

Distillation

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Page 8: Separating Mixtures

Video:http://

activities.macmillanmh.com/science/ca/scienceinmotion/Common/SIM.html?Module=../Grade5/Chapter7-SeparatingMixtures/

C:\Users\Mekaila Frajman\Videos\RealPlayer Downloads\SIM.flv

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Page 9: Separating Mixtures

Purifying waterStep #1:

Alum surrounds dirt particles in the same way soap surrounds dirt. This causes the dirt particles to get heavy and sink to the bottom

Step #2:The clearer water is skimmed off the

top

Step #3:Filters remove any remaining solid

particles

Step #4:Chemicals are added to kill any

bacteria. (e.g., Chlorine

Settling

Filtration

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