FridayMarch 25, 2011

(Tyndall Effect; Properties of Mixtures)

Bell RingerFriday, 3-25-11

What is the main difference between the three types of mixtures: solutions,

colloids, and suspensions?The main difference between solutions,

colloids, and suspensions is the size that

the solute particles are broken down into by the

solvent.

Announcements

If you have not yet taken our last test (Test 8), please see

me ASAP!

Six-Week’s Assignment List Date Issued Date Due

WS - The Kinetic Molecular Theory and Nature of Gases 2/24 3/3

Quiz – Pressure Unit Conversions 3/3 3/3

WS – The Gas Laws 3/3 3/10

WS – Dalton’s Law of Partial Pressures 3/7 3/14

WS – Practice Working with Gases 3/9 3/23

TEST 8 3/11 3/11

WS - Solubility 3/21 3/28

WS – Types of Mixtures 3/23 3/30

Complete Worksheet

Types of Mixtures

Tyndall Effect• Many colloids appear

homogeneous because the individual particles cannot be seen.

• The particles are, however, large enough to scatter light.

• You have probably noticed that a headlight beam is visible on a foggy night.

Tyndall Effect• This effect, known as the

Tyndall effect, occurs when light is scattered by colloidal particles dispersed in a transparent medium.

• The Tyndall effect is a property that can be used to distinguish between a solution and a colloid.

Properties of Solutions, Colloids and Suspensions