Solutions
Chapter 12 Modern Chemistry
Sections 1-3
Types of Mixtures
The Solution Process
Concentrations of Solution
1
Section 12.1
Types of Mixtures
Chapter 12 Section 1 Types of
Mixtures p. 401-406
2
Vocabulary
Colloid
Dispersed phase
Dispersing medium
Electrolyte
Nonelectrolyte
Solute
Solvent
Solution
Suspension
Tyndall Effect
[Types of Colloids]
[Types of Mixtures]
Chapter 12 Section 1 Types of
Mixtures p. 401-406
3
SOLUTE
TYPES OF MIXTURES
SOLVENT
SOLUTION
COLLOIDS
ELECTROLYTES
NONELECTROLYTES
SUSPENSIONS
TYPES OF
COLLOIDS
DISPERSED
PHASE
Concept Map 12.1
DISPERSING
MEDIUM
TYNDALL EFFECT
Chapter 12 Section 1 Types of
Mixtures p. 401-406
4
Solution
• A homogeneous mixture of two or more
substances in a single phase
• Particles are thoroughly mixed and remains
mixed indefinitely
• Components of a solution
– Solvent: does the dissolving; the larger
amount
– Solute: is being dissolved; the smaller
amount
Chapter 12 Section 1 Types of
Mixtures p. 401-406
5
Liquid and solid solutes
p. 402
Chapter 12 Section 1 Types of
Mixtures p. 401-406
6
Solute-Solvent Combinations
• Solutes and solvents can be any state of
matter.
• Look at page 402 for examples
• Alloys –
solid
solutions
of metals
p. 402
Chapter 12 Section 1 Types of
Mixtures p. 401-406
7
Types of Solutions Image
notes
Chapter 12 Section 1 Types of
Mixtures p. 401-406
8
Gold and Gold Alloy Image
p. 403
Chapter 12 Section 1 Types of
Mixtures p. 401-406
9
Mixtures That Are Not Solutions
• Suspensions – particle settle out if not
stirred constantly; large particle size
• Comparing solutions, colloids and
suspensions on page 404
p. 404
Chapter 12 Section 1 Types of
Mixtures p. 401-406
10
Mixtures That Are Not Solutions
Colloids
• Particle size between suspension & soln.
COLLOIDAL DISPERSION
DISPERSED PHASE
cornstarch
DISPERSING MEDIUM
water
Chapter 12 Section 1 Types of
Mixtures p. 401-406
11
Tyndall Effect
• Occurs when light is scattered by colloidal
particles dispersed in a transparent medium
Chapter 12 Section 1 Types of
Mixtures p. 401-406
12
Classes of Colloids
• Foams and emulsions are types of
colloids.
• Table on page 404.
p. 404
Chapter 12 Section 1 Types of
Mixtures p. 401-406
13
Emulsion Image
notes
Chapter 12 Section 1 Types of
Mixtures p. 401-406
14
Electrolytes & Nonelectrolytes
• Electrolyte – a substance that dissolves in
water to give a solution that conducts electric
current
– Ionic compounds and highly polar molecules
form electrolytes
• Nonelectrolytes – a substance that dissolves in
water to give a solution that does not conduct
electricity
Chapter 12 Section 1 Types of
Mixtures p. 401-406
15
Electric Conductivity in Solutions
p. 406
Chapter 12 Section 1 Types of
Mixtures p. 401-406
16
Ch 12 Sec 1 Homework
Section Review Page 406 # 1-6
Chapter 12 Section 1 Types of
Mixtures p. 401-406
17