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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/Oxidation7/27/2019 113194006_13194013_Nurul Choiriyah_Linda Wirianty_Preventing Browning Reaction in Potatoes
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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