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Lesson Plan Electrochemistry

Learning Subject
: Chemistry
Topic Learn
: Redox and Electrochemical
: XII/1
Time Allocation
: 1 x 25 minutes
Standard Competencies :
Live and practice the teachings of the religion they hold.
Live and practice honest behavior, discipline, responsibility, care (mutual cooperation, cooperation, tolerance,
peace), polite, responsive and pro-active and show attitude as part of the solution to various problems in
interacting effectively with the social and natural environment and in placing itself as a reflection of the nation in
the world association.Understanding, applying, analyzing factual, conceptual, procedural knowledge based on his
curiosity about science, technology, art, culture, and humanities with humanity, nationality, state, and civilization
insights regarding the causes of phenomena and events, and applying procedural knowledge to the field of study
that specific according to their talents and interests to solve problems.
Understanding, applying, analyzing and evaluating factual, conceptual, procedural, and metacognitive knowledge
based on his curiosity about science, technology, art, culture, and humanities with human, national, state, and
civilization insights related to the causes of phenomena and events, and to apply procedural knowledge in specific
fields of study according to their talents and interests in solving problems.
Cultivate, reason, present, and create in the realm of concrete and abstract domains related to the development of
what they learn in school independently and act effectively and creatively, and be able to use methods according
to scientific principles.
Basic Competencies :
3.3 Evaluate the symptoms or processes that occur in the example of electrochemistry cells (vota cells and electrolysis
cells) used in life.
4.3 Create ideas for electrochemistry cell products.
Indicators of Competency Achievement :
3.3.1 Identify the meaning of redox reactions.
3.3.2 Determine the oxidation number of a compound.
3.3.3 Balancing the redox reaction equation by the oxidation number method and half the reaction.
Forms of Activities
Teacher’s Questions
Students Answers
 Assalamu’alaikum warahmatullah
 Wa’alaikumussalam warahmatullah
 Good morning class. Are you doing good
Students answer
the teacher
greetings, prays,
and condition
themselves ready
to learn
 Ok. Before we study, lets pray together.
One of you please lead the prayer.
 Good morning miss. We are fine,
 Ok friends. Before we study, lets pray
together. Pray begin. Finish.
 Ok. Some were absent today?
 No, miss.
 Ok. Now please look around you. Is it
 Yes miss
 Ok. Then now please take out your books
 .Ok miss.
and prepare the stationery
Students and
 Anyone know what we will learn today?
 Electrochemistry, miss. Is it right?
teacher ask
 Yes, you are right. Today we are going to
 Ok, miss.
question relate
talk about electrochemistry. But, before that
to learn.
we will talk about redox reactions.
 First when you were in class X you already
 Sorry miss. We forgot.
got material about redox. Does anyone still
remember what is a redox reaction?
 It’s ok. No problem. We will remember it
 Ok miss.
Students listen to
 Before that, I hope you can identify the
meaning of redox reactions, determine the
objectives and
oxidation number of an element, equalize
an explanation
redox reactions, and be able to cite examples
of the benefits of
of redox reactions in everyday life after
getting this lesson today.
 Fine, miss. we will try to understand this
Main Activities
 Ok. Look at the picture please. Have you
ever seen this picture before?
Observe images
 Yes, it’s true. Anyone know what oxidation
of rusty apples
and nails.
 Is that a picture of apples and nails
undergoing oxidation, miss?
 Ah, I began to remember, miss. Is oxidation
a reaction to a decrease in oxidation number,
 Yes, very true. Then if redox stands for
 If oxidation is decreasing, then does the
reduction-oxidation. What is reduction?
reduction in oxidation number increase?
 Yah, thats right. Now does anyone
remember how to determine the oxidation
Asking what is a
redox reaction
 Redox is an increase and decrease reaction
of oxidation numbers. Is it true?
number of an element?
 Yes, right. But there is one thing that was
and how to
missed. In redox reactions other than
equalize a redox
changes in oxidation numbers, what else
 So what is a redox reaction?
 Electron handover, miss.
 Redox reactions are electron handover
reactions accompanied by changes in
oxidation number miss.
 Then, please pay attention to the following
 Yes, miss.
equation. Is the equation equivalent?
 Noo, this equation is not equivalent. Try to
 Not yet, miss.
see again. Are the elements on the left and
right sides all the same?
 So what do you think right now?
 How to make these equations equivalent,
miss?/what is the redox relationship with
Data collecting
 Ok. To answer your question, now please
Looking for
open your book or your phone. Then please
information from
look for information on how to balance the
various sources
redox reaction equation.
 Ok miss.
how to equalize
the redox
 Ok guys. Is it done?
 Yes, miss.
Practice search
 Then, please answer the questions that are
 Ok, miss.
available on your worksheet.
 Ok guys. Have you finished? Please one of
you presented the result of the discussion.
 Me, miss. To number one with the half
reaction method. The reduction reaction is
Present the
NO3- → NO2 then the oxidation reaction is
results of the
Cu → Cu2+.
then because NO2 lacks oxide so H2O is
added. After that, because in the left section
NO3- lacks as much as 2 hydrogen so 2H+ is
added. After that, balance the number of
electrons. So the equation becomes NO3- +
2H+ + e̅ → NO2 + H2O. Then, in the other
reaction, just equal the number of electrons.
So, the equation becomes Cu → Cu2+ + 2̅e.
After that, turn it back into one reaction by
eliminating electrons. So the reaction
equation becomes 2NO3- + 2H+ + Cu →
2NO2 + 2H2O + Cu2+.
 Yeah, that’s true. Then how to equate it with
the method of changing oxidation numbers?
 Me, miss. First, look for elements that have
changed oxidation numbers. That is
Nitrogen and Copper. Then, equal the
number of electrons there are left and right
segments.. It is nitrogen oxidizing by 2
electrons and copper experiencing reduction
by 1 electrons. So the equation becomes
2NO3- + Cu → 2NO2 + Cu2+. Because on
the right side the charge is +2 while the left
side is -2, so it adds 4H+ on the left side.
Last, because in the right side it lacks 4
Hydrogen atoms so 2 molecules of H2O are
added to the left side.
 Ok, class. Because the time is almost up.
 Me, miss. In balancing the redox reaction
Anyone want to conclude our material
equation there are two methods, namely the
half reaction method and the oxidation
number change method.
 Yeah, it’s true. Before closing our study
 No, miss.
today, are there any questions?
 Because there is no question, please oen
 Ok, miss. Wa’alaikumussalam
page 30. There are some questions you can
warahmatullah wabarakaatuh. Thank you,
do for practice . and don’t forget to learn
about electrochemistry for oue material
supplies next week. See you next week,
Wassalamu’alaikum warahmatullah
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