LESSON PLAN IN CHEMISTRY

Prepared By:MARIVIC BULDA FRANCISCO

ERNESTO RONDON HIGH SCHOOLQuezon CityPHILIPPINES

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TARGETS: At the end of lesson , the students are expected to;

18 K Gold ring

1. Define concentration of solutions.

3. Express concentration of solutions in molarity.

4. Evaluate common solutions in terms of their concentration.

2. Differentiate between dilute and concentrated solutions.

Dilute and concentrated solutions

Expressing concentration of solutions in molarity.

Evaluating concentrations of common solutions

TOPIC: Concentration of Solutions

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brass steel

muriatic acid

rubbing alcohol

Acetic acid

Juices

dextrose

vinegar

These are some common solutions ……

Do you use these at home?

Identify three examples of solutions that you commonly use

Let us recall the difference between solute and solvent in a solution.

Solutions Solute Solvent1. 18 Karat Gold Copper (6 parts) Gold (18 parts)2. 3.4.

What is a Solution? A solution is a homogeneous mixture of two or more substances.

What is a Solute? Solute is the substance dissolved. It is present

in a lower concentration.

Solvent is the dissolving medium. It is present in a greater concentration.

What is a Solvent?

Welcome to SOLUTIONS AT WORK!

We will explore the following;1.Dilute and concentrated solutions.2. Concentration of solutions3. Molarity4. Evaluating some common solutions

INTRODUCTION

Which of them is the most concentrated?

Click on the glass number, to find if you are correct.

Sweet, sweeter, sweetestThe glasses below contain apple juice.....

1 2 3 4 5

http://en.wikipedia.org/wiki/Concentration

I’m Sorry

INCORRECT

Try Again…

BACK NEXTHOME

Did you taste it?

FANTASTIC!GREAT

JOB

BACK NEXTHOME

Which of them is the most concentrated? How will you know the sweetest?

Sweet, sweeter, sweetestThe beakers below contain sugar

solutions.....

1 2 3http://www.ask.com/pictures?l=dis&o=15561&q=beaker%20of%20water&qsrc=168

YES…We have to know the amountof sugar dissolved in water to form

the solution.This is what we call

INTRODUCTION

CONCENTRATION of SOLUTIONS(the relative amount of solute dissolved in a given solvent)

Concentration of Solutions

Solutions

SolventSolute in relative proportions

called

contain

DID YOU GET IT?

Let’s Move on…We will now go to another

level.

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A. Particles of dilute CuSO4 solution

CuSO4 -Solute

H2O-SolventSolution

How many layers of

the solute (CuSO4)

particles are there?

3 layers

http://universe-review.ca/I12-18-solution.jpg

How many layers of the

solute (CuSO4) particles are

there?

B. Particles of concentrated CuSO4 (copper sulfate) solution

CuSO4 -Solute

H2O-SolventSolution

5 layers

A B

The following pictures show particles in a mixtureof water(red & white) and bromine (yellow) .

Which one is more concentrated? Why?

BACK NEXTHOME

There are more yellow particles (4 pieces) seen….

Very Good! BA

More solute particles, more concentrated

What is the difference between dilute and concentrated solutions?

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Dilute CuSO 4

solution

Concentrated CuSO

4 solution

Contains more solvent,

the solute becomes

more dilute (more spaces between the

solute molecules

Contains less solvent, less spaces

between the solute

molecules

Any questions?

A solution is dilute if more solvent particles are present with same amount of solute.

Write your name below the statement if you agree with it.

NAMES HERENAMES HERE

More questions?

A solution is concentrated if

more solute particles is

present with same amount

of solvent.

Write your name beside the statement if you agree with it.

NAMES HERE

Concentration of Solutionscan be expressed

Solutions

SolventSolute in relative proportionscalled

asMolarity

%By Mass% By Volume

NormalityMole Fraction

contain

ConcentratedDilute

Low High

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This is another example of dilute and concentrated solutions.

Which is dilute? Which is concentrated?

Dilute

Concentrated

The concentration here is viewed in terms of M (Molarity)

Less Volume of Solution Greater Volume of Solution

To understand about MOLARITY, and more about solutions,

Click Below

BACK HOME

Welcome to the World of MOLARITY

We may now explore the different sample problems given.

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