113194006_13194013_Nurul Choiriyah_Linda Wirianty_Preventing Browning Reaction in Potatoes

7/27/2019 113194006_13194013_Nurul Choiriyah_Linda Wirianty_Preventing Browning Reaction in Potatoes

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SYLLABUS

School : Senior High School

Class : X

Competences :

KI 1 : Appreciate and practice of their religion

KI 2 : Appreciate and practice honest behavior, discipline, responsibility, caring (mutual assistance, cooperation, tolerance, peace),

polite, responsive and pro-active and displayed as part of the solution to various problems in interacting effectively with the

social and natural environment as well as in position ourselves as a reflection of the nation in the association world.KI 3 : Understand, apply, analyze factual knowledge, conceptual, procedural, based on his curiosity about science, technology, arts,

culture, and humanities with an insight into humanity, national, state, and civilization-related causes of phenomena and events,

as well as applying procedural knowledge in the field of study specific according to their talents and interests to solve problems

KI 4 : Processing, reasoning, and presenting in the realm of the concrete and the abstract domains associated with the development of a

self-learned in school, and is able to use the method according to the rules of science.


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Basic Competence Material Learning Activities AssessmentTime

AllocationReference

1.1 Recognizing the

structural regularity of

particle matter as the

greatness of God

Almighty and the

knowledge of the

structure of matterparticles as a result of

human creative

thinking that truth is

tentative.

Oxidation-

reduction

concept

Observing :

Observe the characteristic ofchemical changes, e.g : the

color changes of potatoes

become brown.

Asking :

Ask why the color of potatochange become brown after

it was peeled?

Collecting data :

Design an experiment abouteffectiveness of vitamin

that can prevent in browning

reaction of potato.

Doing the experiment abouteffectiveness of vitamin C

to obstruct in browning

Task

Designing

experiments

about

effectiveness of

vitamin C to

obstruct inbrowning

reaction of

potato

observation

scientific

attitude when

designing and

conducting

experiments as

well as a

presentation

1 x 45

minutes

Worksheet Chemistry

Book Class X

Semester 2

2.1 Demonstrate scientific

behavior (curious,

disciplined, honest,

objective, open, able to

distinguish between fact

and opinion, tenacious,

conscientious,

responsible, critical,


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creative, innovative,

democratic,

communicative) in

designing and conducting

experiments and

discussions are realized

in everyday behaviors.

2.2 Demonstrate

cooperative behavior,

polite, tolerant, peace-

loving and caring

environment and efficient

in utilizing natural

resources.

2.3 Demonstrate behaviors

responsive, and proactive

and prudent as a

manifestation of the

ability to solve problems

and make decisions

reaction of potato

Observe the color changesthat occur in potato

note the result ofexperiment and rank the

most effective solution that

can prevent to obstruct in

browning reaction.

Associate :

Analysis data to concludethe most effective solution

that can prevent browning

reaction of potatoes

Communicate:

Communicating the result ofexperiment in front of theclass

with the

observation

sheet

portfolio

Answer the

questions on

the worksheet


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3.9 Analyze the

development of the

concept of oxidation-

reduction reactions

4.9 Design, conduct, and

conclude and present the

experimental results of the

oxidation-reduction

reaction.


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LESSON PLAN

School : Senior High School

Subject : Chemistry

Class/Semester : X/2

Time Allocation : 1 x 45 minutes

I. Basic Competence

1.1 Recognizing the structural regularity of particle matter as the greatness of God Almighty and

the knowledge of the structure of matter particles as a result of human creative thinking that

truth is tentative.

2.1 Demonstrate scientific behavior (curious, disciplined, honest, objective, open, able todistinguish between fact and opinion, tenacious, conscientious, responsible, critical, creative,

innovative, democratic, communicative) in designing and conducting experiments and

discussions are realized in everyday behaviors.

2.2 Demonstrate cooperative behavior, polite, tolerant, peace-loving and caring environment and

efficient in utilizing natural resources.


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Process:

1. Formulating the hypothesis2. Doing the experiment3. Filling the observation table4. Performing data analysis5. Formulating the conclusion

Affective

Character:

1. Honest2. Responsibility3. PatientSocial Skills:

1. Communication with friends in a group.2. Cooperation with friends.3. Being a good listener, ask questions, express opinions, respond to questions ,and to

respect the opinions of others in the group discussions.

III. Objectives

Cognitive


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Affective

Character:

In learning process, students can show the character of honest, responsibility and confidence

solution in accordance with assessment sheet 2: Character

Social Skills:

In learning process, student can make communication with friends in group, cooperation in

completing group task and Being a good listener, ask questions ,express opinions, respond to

questions ,and to respect the opinions of others in the group discussions in accordance with

assessment sheet 3 : Social Skill

IV. Learning Material

A. Main Material : Redox ReactionB. Sub material : Oxidation reaction

The oxidation stateis an indicator of the degree ofoxidation of

anatom in achemical compound. The formal oxidation state is

the hypotheticalcharge that an atom would have if all bonds to atoms of different

elements were 100%ionic.The increase in oxidation state of an atom through a

chemical reaction is known as an oxidation; a decrease in oxidation state is
http://en.wikipedia.org/wiki/Oxidationhttp://en.wikipedia.org/wiki/Atomhttp://en.wikipedia.org/wiki/Chemical_compoundhttp://en.wikipedia.org/wiki/Electrical_chargehttp://en.wikipedia.org/wiki/Ionic_bondhttp://en.wikipedia.org/wiki/Ionic_bondhttp://en.wikipedia.org/wiki/Electrical_chargehttp://en.wikipedia.org/wiki/Chemical_compoundhttp://en.wikipedia.org/wiki/Atomhttp://en.wikipedia.org/wiki/Oxidation


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V. Learning Model

Problem Based Learning

VI. Learning Method

Observation Group discussion

VII. Learning Resources and Learning Media

1. Learning Resources:a.Chemistry Book Class X Semester 1

b. Worksheet

2. Media for Learning:Tools and Materials for observation

V. LEARNING PROCEDURE

ActivityDone Assessment Score


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potato in order to not become brown?

Main Activity (35 minutes)

Phase 2 : Organizing student to study

1. Teacher divide the student into 2 group, that contain 4member in each group

2. Teacher give redox worksheet to every student3. Teacher guide the student to make hypothesis based on

the experiment

4. Teacher explain the procedure of experimentPhase 3 : Teacher guiding and group investigation

1. Teacher ask to one of member in group take the material andequipment

2. Teacher remember the student to carefully and doexperiment appropriate with the redox worksheet

3. Teacher guiding student to do investigation and observe theproblem

Phase 4 : Developing and presenting the resul t

1 T h k h t f lfill th t bl lt d


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experiment

3. Teacher guide student to conclude about experimental resultthat has been done

4. Teacher evaluate the learning process that happen by asking is there any difficulties in solving the problem?

5. Teacher helps students to reflect on their investigationand the process they done.

VIII. Assessment Learning result:1. Worksheet asassesment sheet 1: Product2.

Key worksheet

3. Assessment Sheet 2 : Process4. Assessment sheet 3: character5. Assessment sheet 4: social skill

IX. ReferencesSudarmo, Unggul. (2005).Kimia Untuk SMA Kelas X. Publisher: Erlangga

didik i l d b l b i j


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ASSESSMENT SHEET 1 : PRODUCT

WORKSHEET


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REDOX REACTION AND ITS

APLICATION IN DAILY LIFEA. Basic Competence

1.1 Recognizing the structural regularity of particle matter as the

greatness of God Almighty and the knowledge of the structure of

matter particles as a result of human creative thinking that truth is

tentative.

2.1 Demonstrate scientific behavior (curious, disciplined, honest,objective, open, able to distinguish between fact and opinion,

tenacious, conscientious, responsible, critical, creative, innovative,

democratic, communicative) in designing and conducting

experiments and discussions are realized in everyday behaviors.

2.2 Demonstrate cooperative behavior, polite, tolerant, peace-loving

and caring environment and efficient in utilizing natural resources.

2.3 Demonstrate behaviors responsive, and proactive and prudent as amanifestation of the ability to solve problems and make decisions

3.9 Analyze the development of the concept of oxidation-reduction

i


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C. The main problem

Choey likes cooking so much. one day she have a party in

the beach with her friends. she prepared many potatoes for

barbeque, then she peeled the potatoes at home so she canenjoy the party without peel potatoes again. when she was

arriving at the beach, she was shocked because her potatoes

become brown. then Linda said that actually choey must soak

the potatoes into lime solution.

Do you know why Linda said that? what the effect of

soaking potatoes in lime solution? lets break this problem!

[Year

]


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F. Equipment and Materials

a. Equipment :

- Knives

- Small bowl

b. Material :

- Potato

- Water

- Solution Vitamin C

- Lime Solution

- Salt solution

- Vinegar

G. Procedure :

1 Prepare tools and materials


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H. Experiment Data :

Number TreatmentObservation the color

Before After

1Potato with

no treatment

2

Potato

dipped in

lime solution

3

Potato

dipped in

vitamin C

solution

4.Potatodipped in

salt solution


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I. Experiment Analysis

1. a Based on your observation, which potato that shows color

changes?

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

b. From your answer in 1a, which potato that change faster?

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

2. a. Which potato that shows no color changes of potatoes?

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

b. what is the contain of that solution and why it can keep the

color of potato?

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

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

[Year

]


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KEY WORKSHEET

REDOX REACTION AND ITS

APLICATION IN DAILY LIFEA. Basic Competence

1.1 Recognizing the structural regularity of particle matter as thegreatness of God Almighty and the knowledge of the structure of

matter particles as a result of human creative thinking that truth is

tentative.

2.1 Demonstrate scientific behavior (curious, disciplined, honest,

objective, open, able to distinguish between fact and opinion,tenacious, conscientious, responsible, critical, creative, innovative,

democratic, communicative) in designing and conducting

experiments and discussions are realized in everyday behaviors.

2.2 Demonstrate cooperative behavior, polite, tolerant, peace-loving

and caring environment and efficient in utilizing natural resources.


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C. The main problem

Choey likes cooking so much. one day she have a party in

the beach with her friends. she prepared many potatoes for

barbeque, then she peeled the potatoes at home so she can

enjoy the party without peel potatoes again. when she was

arriving at the beach, she was shocked because her potatoes

become brown. then Linda said that actually choey must soak

the potatoes into lime solution.

Do you know why Linda said that? what the effect of

soaking potatoes in lime solution? lets break this problem!

[Year

]


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F. Equipment and Materials

a. Equipment :

- Knives

- Small bowl

b. Material :

- Potato

- Water

- Solution Vitamin C

- Lime Solution

- Salt solution

- Vinegar

G. Procedure :

1. Prepare tools and materials


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H. Experiment Data :

Number TreatmentObservation the color

Before After

1Potato with

no treatmentyellow Brownish yellow (++)

2

Potato dipped

in lime

solution

yellow yellow

3

Potato dipped

in vitamin C

solution

yellow Bright Yellow

4Potato dipped yellow

Brownish yellow (+++)


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I. Experiment Analysis

1. a Based on your observation, which potato that shows color

changes?

potato which dipped in water, no treatment and salt solution

b. From your answer in 1a, which potato that change faster?potato which dipped in salt solution

2. a. Which potato that shows no color changes of potatoes?

potato which dipped in vitamin C solution, lime solution and

vinegar

b. what is the contain of that solution and why it can keep thecolor of potato?

vitamin C solution and lime solution has vitamin C, that content

of anti o idant compo nd altho gh inegar doesnt has itamin

[Year

]


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ASSESSMENT SHEET 2 : PROCESS

Name :

Class :

Date :

NO ASPECT THAT ASSESSEDMAX

SCORESCORE

1. Formulating hypothesis 10

2. Identifying manipulation variable 10

3. Identifying response variable 10

4. Identifying controls variable 10

5. Doing experiment appropriate with procedure 10

6. Write the experiment result in table 20

7. Doing analysis based on the experiment result 20


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ASSESSMENT SHEET 3: CHARACTER

Observation Format of Character Behavior

Name :

Class :

Date :

Assessing instruction: For each character behavior below, the assessment of students character

behavior is by using scale with the options:

Option Score

A = Very good 4

B = Good 3

C = Enough good 2

D = Bad 1

No Aspect A B C DNote

1 Honestly (recording the result of group

discussion)

2 R ibl f l i k


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ASSESSMENT SHEET 4: SOCIAL SKILL

Observation Format of Social Skill

Name :

Class :

Date :

Assessing Instruction: For each social skill below, the assessment of students social

skill is by using scale with the options:

Option Score

A = Very good 4

B = Good 3

C = Enough good 2

D = Bad 1

No Aspect A B C D Note

1 Communication with friends

i hi /h


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OBSERVATION SHEET FROM 3 OBSERVER

Activity

1sobserver 2

nobserver 3

robserver

DoneScore

DoneScore

DoneScore

Yes No Yes No Yes No

Opening activity (5 minutes)

Phase 1 : Ori entation to the problem

1. Teacher checked student attendance2. Teacher asked student about the last material (oxidation

reduction topic)

3. Teacher motivate the students with bring the small pieces ofpotato that have been browning effect. Ask to student Why the

color of potato became brown?

4. Teacher assist student to find authentic problem from studentsknowledge and information : how to keep the original color of

potato in order to not become brown?

Main Activity (35 minutes)

Phase 2 : Organizing student to study

1. Teacher divide the student into 2 group, that contain 4member in each group

2. Teacher give redox worksheet to every student

4

4

3

3

4

4

2

2

3

4

2

2

4

4

4

4

4


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3. Teacher guide the student to make hypothesis based onthe experiment

4. Teacher explain the procedure of experimentPhase 3 : Teacher gui ding and group investigation

1. Teacher ask to one of member in group take the material andequipment

2. Teacher remember the student to carefully and doexperiment appropriate with the redox worksheet

3. Teacher guiding student to do investigation and observe theproblem

Phase 4 : Developing and presenting the resul t

1. Teacher ask each group to fulfill the table result and answerthe questions

2. Teacher ask student to take my number in front of the class 3. Teacher ask the student to prepare result of experiment in front

of the class

4. the teacher asks representatives from each group to present theexperimental results by means scrambles number on steering

wheel

3

4

4

3

3

4

4

3

4

3

3

3

3

3

3

4

4

3

3

4

3

4

4

4

4

4


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Phase 5 : Analyzing and evaluating the problem solving process

1. Teacher ask student to compare the result both of group2. Teacher asks all student to analyze the result of their

experiment

3. Teacher guide student to conclude about experimental resultthat has been done

4. Teacher evaluate the learning process that happen by asking is there any difficulties in solving the problem?

5. Teacher helps students to reflect on their investigation andthe process they done.

4

3

4

4

3

3

3

3

4

3

4

4

4

4

3

113194006_13194013_Nurul Choiriyah_Linda Wirianty_Preventing Browning Reaction in Potatoes

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