Term 3 Summary

Term 3 Summary

Summary of topics done in Term 3

TYPES OF MIXTURES

• There are two types of mixtures: Heterogeneous and Homogeneous mixtures.

• Heterogeneous mixtures can be either colloids or suspensions.

• Solutions are the only type of homogeneous mixtures.

SOLUTIONS

A solution is a mixture of two or more substances resulting in a mixture that has the same composition and properties throughout

SOLUTION

• Solution are made by dissolving a solute into a solvent.

• The solvent is the dissolving medium while the solute is the substance that is dissolved in a solution.

SOLUTIONS

Solutes and solvents can be solid, liquid or gas and each state of matter can combine with either itself or another state of matter to make a solution

Multiple Choice

What is a "homogeneous mixture of two or more substances in a single phase"?

• Solution
• Solvent
• Solute
• Compound

Multiple Choice

What does it mean to be "Soluble" ?

• Capable of being a solid.
• To have soul.
• Capable of being dissolved.
• To sink.

Multiple Select

Which of the following are considered to be heterogeneous mixtures? (Choose all that apply)

• Colloid

• Solution

• Suspension

• None are heterogeneous

Multiple Choice

The substance dissolved in a solution is called ... 

• colloid
• solution
• solute
• solvent

Multiple Choice

The dissolving medium in a solution is called ... 

• colloid
• solution
• solute
• solvent

COLLOIDS

• A colloid is a mixture in which one substance of insoluble particles are are evenly dispersed throughout another substance.

• The colloidal particles make up the dispersed phase, and water (or other liquids, solids or gases) is the dispersing medium.

COLLOIDS

Similar to solutions, colloids can be classified according to their dispersed phase and dispersed medium.

Multiple Choice

Which one is not a colloid

• Foam

• Gel

• Emulsion

• Coffee

Multiple Choice

A stable mixture of two or more liquids e.g. icecream

• emulsion

• solution

• mixture

• insoluble

Multiple Choice

Milk is an example of a

• solution

• colloid

• suspension

• solid

SUSPENSION

If the particles in a dispersing medium are so large that they settle out unless the mixture is constantly stirred or agitated, the mixture is called a suspension.

The particles in suspension can be separated from heterogeneous mixtures by passing the mixture through a filter.

TYNDALL EFFECT

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

• This effect is greatly evident in colloidal dispersion, slightly evident in suspensions and not evident in solutions.

ELECTROLYTES AND NON ELECTROLYTES

• A substance that dissolves in water to give a solution that conducts electric current is called an electrolyte.

• A substance that dissolves in water to give a solution that does not conduct an electric current is called a nonelectrolyte.

• Ionic compounds and certain highly polar molecular substances are electrolytes, while low polar substance are non electrolytes.

Multiple Choice

Solutions in which electric currents cannot run through are said to be

• noncolloidal
• electrolytes
• nonelectrolytes
• conductors

Multiple Choice

a solute whose water solution conducts electricity is called a(n)

• nonconductor
• electrolyte
• nonelectrolyte
• aqueous solution

Multiple Choice

Name the effect

• brownian

• tyndall

• suspension

• colloidal

Multiple Choice

What type of mixture separates upon standing?

• Solution
• Alloy
• Colloid
• Suspension

Multiple Choice

An example of a nonelectrolyte is

• sugar water
• salt water
• sodium chloride
• hydrogen chloride

Multiple Choice

Which one does NOT scatter light?

• solution

• colloid

• suspension

Multiple Choice

A snow globe is an example of a/an

• solution

• suspension

• colloid

• alloy

Multiple Choice

The beaker on the right would be a _______

• Solution

• Suspension

• Colloid

• Impossible to tell