Lesson Plan: Electrolyte and non electrolyte solutions

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LESSON PLAN

Education Level                : Senior High School
Subject                              : Chemistry
Grade/ Semester                : X / II
Topic                                 : Electrolyte and non electrolyte solutions
Sub Topic                          : Electrolyte and non electrolyte solutions
Types of solution based on electric conductivity power.
Types of electrolyte solution based on the bonding.
Academic Year                 : .........../................
Time Allocation                : 3 x 45 minutes
Standard Competence      : Comprehending the electrolyte and non electrolyte solution properties and reaction of oxidation and reduction)
Basic Competence            : Identifying the characteristics of electrolyte and non electrolyte solution based on data result of experiment

I.             INDICATOR
1.      Identify solution characters of electrolyte and non electrolyte through experiment.
2.      Group the solution into solution of electrolyte and non electrolyte based on electrical conductivity character.
3.      Explain the ability caused the solution of electrolyte can conduct electric current.
4.      Describe that electrolyte solution can be in the form of ionic compound and polar covalent compound.

II.          PURPOSE OF LEARNING
1.            Students of Senior High School Class X semester 1 can identify solution characters of electrolyte and non electrolyte through experiment.
2.            Students of Senior High School Class X semester 1 can group the solution into solution of electrolyte and non electrolyte based on electrical conductivity character.
3.            Students of Senior High School Class X semester 1 can explain ability caused the solution of electrolyte can conduct electric current
4.            Students of Senior High School Class X semester 1 can describe that electrolyte solution can be in the form of ionic compound and polar covalent compound

III.       LESSON MATERIAL
1.      Electrolyte and non electrolyte solutions
Electrolyte solution is a solution which can conduct the electricity current and the dissolved substances in the solution are called electrolyte substances.
Non-electrolyte solution is a solution which cannot conduct the electricity current and the dissolved substances in the solution are called non-electrolyte substances.
According to Arrhenius, electrolyte solution can conduct the electricity because in the electrolyte solution there are ions that can move freely. These ions which can conduct electric current.
Following are examples of reaction of electrolyte substances entered in water.
NaCl(s)  à  Na+(aq)  +  Cl-(aq)
NaOH(s)  à  Na+(aq)  +   OH-(aq)
H2SO4(l)  à  2H+(aq)  +  SO42-(aq)
2.      Solution type based on electric conductivity power.
Determining a solution include electrolyte or non electrolyte is based on the ability to conduct electricity current. Electrolyte solution can make the lamp glow and there are gas bubbles in the electrode. Otherwise, nonelectrolyte solution cannot show the changes.
Electrolyte solution that make the lamp glow and there are gas bubbles in the electrode called strong electrolyte, meanwhile electrolyte solution that not make the lamp glow and there are gas bubbles in the electrode called weak electrolyte.
The examples of strong electrolyte: the solution of HCl, H2SO4, and CaCO3.
The examples of weak electrolyte: the solution of ammonia, CH3COOH and H2S.
3.      Solution type of electrolyte based on bonding
Electrolyte substances consist of ionic compounds and polar covalent compounds. Ionic compound that are in the form of solid, the ions cannot move freely like in the form of solution. It cause ionic compound in the form of solid cannot conduct electric current. But in meltage, ions of ionic compound can move freely so can conduct electric current. Examples: NaCl, KCl, and CaO
The solid and meltage of covalent compound cannot conduct the electric current because covalent molecules not contain ions. But the solution of polar covalent compound can conduct the electricity current. Examples: HCl and CH3COOH
 Both types of the compounds when entered into water will be dissociated into ions, and the ions will be hydrated (bound on water molecules), so the ions can move freely.
Meanwhile, nonelectrolyte substances if they are dissolved in water will not be dissociated into ions, but they are stay in the form of uncharged molecules. This case causing nonelectrolyte substances can not conduct electricity.
Examples:
C12H22O11(s)  à  C12H22O11(aq) 
C2H5OH(l)  à  C2H5OH(aq)

IV.       LEARNING MODEL
Approach:   Process skill
Method  : Combination of discussion, experiment, and ask & questions.

V.          LEARNING SCENARIO
No
Learning Activities
Time
(minutes)
1.





2.









3.







 Opening
Teacher opens the class by saying greeting and asks the presence.
Teacher conditioning the class so the students ready to accept materials.
Teacher gives apperception
Main Activities
Teacher explains about the experiment will be done.
Teacher conditions the class to do the experiment.
Students do the experiment.
Students report the result of their experiment in a sheet of paper and in the white board.
Students discuss the data in group discussion..
Students make a conclusion about the difference between electrolyte and nonelectrolyte solution.
Teacher clarifies the student’s conclusion.
Closing
Teacher reviews the material.
Teacher gives a chance to student to ask questions.
Individual test.
Teacher gives homework for next meeting.
Teacher gives information about the matter for next meeting.
Teacher closes the class by saying greeting.
2 x 5





95









2 x 15

VI.       LEARNING MEDIA
Chemistry books, students’ worksheet, white board and marker, instruments and materials for experiment.

VII.    REFERENCES
Purba, Michael. 2006. Kimia untuk SMA Kelas X. Jakarta: Erlangga
Sunardi. 2007. Kimia Billingual untuk SMA Kelas X Semester 1 dan 2. Bandung: Yrama Widya.
Sutresna, Nana. 2007. Cerdas Belajar Kimia untuk kelas X SMA/Madrasah Aliyah. Bandung: Grafindo

VIII. ASSESSMENT AND FOLLOW-UP
a.       Assessment: individual test, attitude assessment, experiment report, and home work.
b.      Continuing:
Student succeed if reach percentage ≥70 % from assessment.
Giving remedial for students whose reach <70 % from assessment.

IX.       INSTRUMENT OF EVALUATION
1.      When glucose is dissolved in water cannot conduct the electric current. Explain the reason!
2.      Can these species conduct the electric current?
species
can
cannot
CO(NH2)2 (aq)
KBr (aq)
NaCl (s)
NaBr (l)
CH3COOH (aq)
3.      Pay attention to the following experiment data!
Determine the solutions include strong electrolyte, weak electrolyte or nonelectrolyte!
Solution
Lamp
Gas bubbles
The kind of electrolyte
Glow
Not
There are
Not
A
V
-
V
-
B
-
V
V
-
C
-
V
-
V
D
-
V
V
-
E
V
-
V
-
F
-
V
-
V
G
-
V
V
-
H
V
-
V
-
4.      Why the strong electrolyte solution can conduct the electric current? Explain it and give 5 example of strong electrolyte solution!
5.      Compare between solid, meltage, and solution of ionic compound. Explain which is the conductor?




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