XI Stoikiometri English

LESSON PLAN

Level of Study : Senior High School

Subject : Chemistry

Topic : Solution Stoichiometri

Subtopic : Acid Base Titration

Grade/Semester : XI/II

Time Allocation : 8x45 minutes

I. STANDART COMPETENCE :

Understanding the properties of acid base solution, the measurement method and its

application.

II. BASIC COMPETENCE :

Calculating amount of reactant and reaction product in electrolyte solution from acid base

titration .

III. INDICATOR

A. Cognitive

1. Product

Determining the concentration of acid or base by titration

Determining the concentration of substances by titration

Determining the appropriate indicators that used in acid-base titration

Determining the concentration of substances from the data of titration

Make a graph of titration from the data of experiment result.

2. Process (Study skill, Learning strategies)

Conduct titration experiment to determine the concentration of acid or base

Summarizing the experiment result

Conduct experiment to determine concentration of substances by titration method

through group work in laboratory

Calculating concentration of substances from experiment data

B. Affective

1. Character Behaviour

1. Accurate

2. Precise

3. Responsibility

4. Honest

5. Can be trusted

6. Open minded and listen friend’s opinion

7. Help friend that needed

2. Social Skill

1. Cooperate well

2. Be good leader in experiment group

3. Be a good listener

4. Asking skill

5. Giving opinion

6. Telling information

IV. LEARNING OBJECTIVES

A. Cognitive

1. Product

Student can determine the concentration of acid or base by titration exactly

Student can determine the concentration of substances by titration exactly

Student can determine the appropriate indicators that used in acid-base titration

exactly

Student can determine the concentration of substances from the data of titration

exactly

Student can make a graph of titration from the data of experiment result exactly

2. Process

Student can conduct titration experiment to determine the concentration of acid or

base exactly.

Student can conclude the experiment result exactly.

Student can conduct experiment to determine concentration of substances by

titration method through group work in laboratory exactly.

Student can calculating concentration of substances from experiment data exactly.

B. Affective


Participating in Teaching and Learning Process, minimal they are valued in making

progress in showing character accurate, precise, responsibility, honest, can be trusted,

open minded and listen friend’s opinion, also help friend that needed

2. Social Skill

Involved in Teaching and Learning Process, student marked advance in social skills :

1. Cooperate



4. Asking skill

5. Giving opinion


V. LEARNING MATERIAL

Acid base titration

The determination of concentration of acid base solution can be done by an

experiment called acid base titration. The word titration means the determination of titer

or concentration. Acid base titration is the titration based on the neutrality reaction of

acid and base. The concentration of acid solution is determined by using the base solution

that the concentration has been known vice versa, the concentration of base solution can

be determined by using acid solution that the concentration has been known.

1. The procedure of acid base titration

The titration is stopped when the indicators show the changing of colour. When the

indicators show the color changing it’s called the final point.

Equivalent point : the pH when the acid and base equivalent precisely

The final point : the pH when the indicators is changed in color

2. The changing of pH in acid-base titration (titration curve)

The graph explain the changing of pH in acid titration with base (or vice versa) is

called titration curve. How is the shape of titration’s curve? On fact, theshape of

titration curve is depend on the power of acid and base that been reacted. The three

kinds of titration:

a. The titration of strong acid and strong base

Some things that can be concluded from the curve are:

1. First, the pH of solution increase little by little, but the extreme enough changing

is done around to the equivalent point

2. The equivalent point of solution pH when the acid and base used up is 7

3. To show the equivalent point can be used the methyl-red, blue brom thymol, etc.

b. The titration of weak acid and strong base

1. The equivalent is more than 7, about 8-9

2. The increasing of pH changing in around of equivalent point more wide, only

about 3 unit, the pH ± 7 until pH ± 10

c. The titration of weak base and strong acid

1. The equivalent point, the pH of solution in the neutrality of weak base with the

strong acid is less than 7

2. The increasing of pH around the equivalent point is more wide, only about 3

unit, the pH is about ± 7 until ± 4

VI. LEARNINGMODEL :

Learning model : Cooperative

Type : Student Teams Achievement Division (STAD)

Learning method : Experiment, discussion, presentation and question and answer

VII. TOPIC : Solution Stoichiometry

SUBTOPIC : Acid Base Titration

VIII. LEARNING ACTIVITY

A. Introduction

Phase 1 : Present Goals and Set

Exploration

1. Teacher relate the topic by giving some question about acid base properties

2. Teacher motivate the student by giving question about concentration of solution in

the bottle of drinking water in daily life.

3. Teacher explain the learning objectives to students

B. Main Activity

Phase 2 : Present Information

Elaboration

4. Teacher explain outline of matter that will be studied.

5. Teacher inform about learning model that will be used.

Phase 3 : Organize Student into learning team

6. Teacher divided students into some groups. Each group consist of three students

heterogeneously.

3. Teacher conditioning students to gather with their groups.

4. Teacher distribute worksheet to each student.

Phase 4 : Assist teamwork and study

5. Teacher ask student to start the experiment

6. Teacher walk around and monitoring the activities of students during experiment,

emphasize that responsibility, cooperate well, be good leader in experiment group is

required to students

7. Teacher guide students in finishing worksheet based on experiment result

accurately and precisely, emphasize honest, can be trusted, and help friend that

needed is required to students.

Phase 5 : Test over materials

8. Teacher ask student to present the result of their discussion in front of the class and

other students become good listener, emphasize that open minded and listen

friend’s opinion to student during discussion.

9. Teacher gives opportunity student to ask (give question).

10. Teacher gives opportunity student to express their opinion about answer of other

friend.

C. Closure

Phase 6: Provide recognition

11. Teacher gives reward for the best group, great group and super group.

Confirmation

12. Teacher give feedback to the learning material

13. Teacher guide students to make summary or conclusion of this matter

14. Teacher end the learning process.

IX. LEARNING SOURCE

1. Student handbook

2. Worksheet

3. Material and Equipment

Materials :

NaOH solution

HCl solution

Phenolphtalein

Equipments :

Pipette

Connical Flask

Burette

Statif

X. ASSESMENT

1. Product

2. Process


4. Social skill

Gresik, 17 July 2011

Known,

Head Master of SMAN 1 Manyar Chemistry Teacher

Drs. H. M. Syafaul Anam, MM

NIP. 196502071988031012 NIP.

Experimental WORKSHEET

Name : .............................................

Class : .............................................

Absent Number : ..........................................

I. Standart Competence :


application

II. Basic Competence :


titration.

III. Indicator :

1. Determining the concentration of acid or base by titration

2. Determining the concentration of substances by titration

3. Determining the appropriate indicators that used in acid-base titration

4. Determining the concentration of substances from the data of titration

5. Make a graph of titration from the data of experiment result.

Determine concentration of HCl solution by NaOH solution 0,1 M!!

Materials :

NaOH solution

HCl solution

Phenolphtalein

Equipments :

Pipette

Connical Flask

Burette

Procedure :

1. Put 20 ml of HCl solution and 3 drops of Phenolphtalein into conical flask

2. Fill the burette with NaOH solution 0,1 M until 0 ml line

3. Dropped HCl solution with NaOH solution. Dropping must be doing carefully and connical

flask shaken continuously. Dropping is stopped when color changing is happened, become

pink solution

4. Repeat the procedure above until obtained 3 data that similar

Observation result

No. Volume of HCl solution Volume of NaCl solution

1.

2.

3.

Analyze Data

1. Determine the average volume of NaOH that used!

2. Determine amount of mol of NaOH that used!

3. Determine amount of mol of HCl based on ratio reaction coefficient!

NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

4. Determine concentration of HCl solution!

Conclusion

Make conclusion of this experiment!

Answer :

.........................................................................................................................................................

.........................................................................................................................................................

---- Good Luck ----

WORKSHEET

Name : .............................................

Class : .............................................

Absent Number : ..........................................

IV. Standart Competence :


application

V. Basic Competence :


titration.

VI. Indicator :

1. Determining the concentration of acid or base by titration

2. Determining the concentration of substances by titration

3. Determining the appropriate indicators that used in acid-base titration

4. Determining the concentration of substances from the data of titration

5. Make a graph of titration from the data of experiment result.

Questions!

1. Determine the equivalent point of this titration, is it < 7; > 7 or

about 7

a. Ca(OH)2 solution with HCl 0,1M solution

b. NH3 solution with HCl 0,1 M solution

c. KOH solution with HCl 0,1 M solution

2. For the titration of 25 mL solution of CH3COOH 0,15 M with

solution of NaOH 0,1 M

a. predict the first pH

b. predict the pH in equivalent point

c.predict the volume of NaOH solution that is needed

d. determine the indicator that is needed

e. draw the scetch of titration curve

3. 1,43 gram sodium carbonate hydrate, Na2CO3. xH2O, is dissolved

in water and the volume of solution is become 100mL. 50 mL of solution is reacted with 10

mL of HCl solution 0,5 M. Determine the formula of hydrates compound.

Answer :

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

---- Good Luck ----

TABLE SPECIFICATION ASSESMENT SHEET

Learning SourceAsessment Sheet and

item testKey of Assesment

Sheet and item test

1. Product

1. Student can determine the

concentration of acid or base by

titration exactly


concentration of substances by

titration exactly

3. Student can determine the appropriate

indicators that used in acid-base

titration exactly


concentration of substances from the

data of titration exactly

5. Student can make a graph of titration

from the data of experiment result

exactly

Product assessment

sheet (AS 1)

Key of assessment

sheet product.

2. Process1. Student can conduct titration

experiment to determine the

concentration of acid or base exactly.

2. Student can conclude the experiment

result exactly.

3. Student can conduct experiment to

Process assessment

Sheet 2 (AS 2)

The assessment

are trusted to

Teacher

determine concentration of substances

by titration method through group

work in laboratory exactly.

4. Student can calculating concentration

of substances from experiment data

exactly.


Participating in Teaching and Learning

Process, minimal they are valued in

making progress in showing character:

1. Accurate

2. Precise

3. Responsibility

4. Honest

5. Can be trusted

6. Open minded and listen friend’s

opinion


Character assessment

sheet (AS 3)

At least get an

assessment

indicates the

progress and

entrusted to the

judgment

Assessors/Teachers

4. Social Skill

Involved in Teaching and Learning

Process, student marked advance in

social skills :

1. Cooperate



4. Asking skill

Social skill Assesment

Sheet (AS 4)

At least get an

assessment

indicates the

progress and

entrusted to the

judgment

Assessors/Teachers

5. Giving opinion


Assesment Sheet 1 (AS 1)

PRODUCT ASSESMENT SHEET

Student Name: Class: Date:

Answer this question based on your experiment result!

Experimental Worksheet :

1. Determine the average volume of NaOH that used!

2. Determine amount of mol of NaOH that used!

3. Determine amount of mol of HCl based on ratio reaction coefficient!

NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

4. Determine concentration of HCl solution!

Worksheet :

1. Determine the equivalent point of this titration, is it < 7; > 7 or about 7

a. Ca(OH)2 solution with HCl 0,1M solution

b. NH3 solution with HCl 0,1 M solution

c. KOH solution with HCl 0,1 M solution

2. For the titration of 25 mL solution of CH3COOH 0,15 M with solution of NaOH 0,1 M

a. predict the first pH

b. predict the pH in equivalent point

c.predict the volume of NaOH solution that is needed

d. determine the indicator that is needed

e. draw the scetch of titration curve

3. 1,43 gram sodium carbonate hydrate, Na2CO3. xH2O, is dissolved in water and the volume of

solution is become 100mL. 50 mL of solution is reacted with 10 mL of HCl solution 0,5 M.

Determine the formula of hydrates compound.


Chemistry Teacher

( )


PROCESS ASSESMENT SHEET


No. Performance Task Maximum Score Score

1. Conduct titration experiment to

determine the concentration of acid

or base

20

2. Summarizing the experiment result 30

3. Conduct experiment to determine

concentration of substances by

titration method through group work

in laboratory

20

4. Calculating concentration of

substances from experiment data

30

Total Score 100


Chemistry Teacher

( )


CHARACTER BEHAVIOURAL ASSESMENT SHEET


Guidance :

For each of the following character behavior, give a character assessment of student behavior using the following scale:D = Requires improvements C = Indicates progress B = SatisfactoryA = Very Satisfactory

Format Observation of Character Behavioural

No.Details of Task

performanceD C B A

1. Accurate

2. Precise

3. responsibility

4. Honest

5. Can be trusted

6. Open minded and listen

friend’s opinion



Chemistry Teacher

( )


SOCIAL SKILL ASSESMENT SHEET


Guidance :

For each of the following character behavior, give a character assessment of student behavior using the following scale:

D = Requires improvements C = Indicates progress B = satisfactoryA = Very Satisfactory

Format Observation of Social Skill

No.Details of Task

performanceD C B A

1. Cooperate

2.Be good leader in

experiment group


4. Asking skill

5. Giving opinion



Chemistry Teacher

( )

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XI Stoikiometri English