LESSON PLAN BUFFER SOLUTION I. SPECIFICATION OF THE SUBJECT LEARNTLearning Subject: ChemistryTopic Learnt: Buffer solutionGrade/Semester : XI/ 2Target Group: Underlied by SETS vision and approachMeeting sequence : 3 week x 4 hour lesson (on syllabus)Time Allocation: 3 meetingII. Core Competencies :CC 1 : Appreciate and practice rules of their religion.CC 2 : Appreciate and practice behavior such as honest, 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 and in placing itself as a reflection of the nation in the association world.CC 3 : Understanding, applying, analyzing factual knowledge, conceptual, procedural based on curious sense 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 specific studies according to their talents and interests to solve the problem.CC 4 : Processing, reasoning, and presenting in the realm of the concrete and abstract domains associated with the development of the self-learned at school, and were able to use the method according to the rules of scienceIII. Achievement Indicators Basic Competence and Core CompetenceKD of KI 1:1.1 Recognizingtheregularity of the structure of matter astheparticlegreatnessofAlmightyGodand theknowledge of the structure of matterparticlesas a resultof humancreative thinkingthat truth is tentative.Indicators : Exalts the greatness of GodAlmighty Recognizingthat theconditionssetbytheAlmightyGodis thebest forus.KDofKI2:2.1Demonstratescientificbehavior (curious, disciplined, honest, objective,open,able to distinguishfactand opinion,tenacious,thorough, responsible, critical, creative, innovative, democratic, communicative)in designandconductexperiments anddiscuss theembodied in everyday behaviors.Indicators: Curiosity Honestlyin usingexperimentaldata toprovea legalchemical basis (usingthe datafor what it isandthe results arein accordance with the dataexperiments) Thorough in processingand analyzingthe data (perform legal proofbasic chemical and consistent tracethestepsandtruth results) Tenacious infindingthe source ofknowledgethat supportsthe completion ofproblem (canresolvetheproblem at thebeginningtotheend of thetracethecorrect steps).KD of KI 3:3.13 Analyzing the nature of the role of the buffer solution in the living bodyIndicators: Mention sense buffer solution Identifying the properties of buffer solutionthroughtrial Explainformationsolutionbuffer Explainrelationshipnature of the buffer onbloodKD of KI 4:4.8 Design, conduct, and conclude and present the results of experiments to determine the nature of the buffer solutionIndicators: Designing experiments to investigate the nature of the buffer solution Experimentingnaturesolutionbufferon some solution Observe and record the experimental datasolutionbuffer Processand m enganalisis experimental data solutionbuffer Summing properties by the addition of buffer solutionslightlyacids, basesordilution Communicate the nature of the experimental resultsbuffer solutionIV. Learning Objectives 1. Students may be aware of the regularity of the solution as a manifestation of the greatness of God Almighty. 2. Students can demonstrate positive attitudes (individual and social) in group discussions 3. Students can demonstrate the behavior and attitude of accepting, appreciating, and executing honesty, rigor, discipline and responsibility 4. Students may mention the sense of a buffer solution 5. Students can identify the properties of buffer solution through trial 6. Students can explain the formation of solution buffer 7. Students are able to explain relationship nature of the buffer on blood 8. Students can design an experiment to investigate the nature of the buffer solution Students can discriminate n trials of an nature solution on some solution. 9. Students can observe and record the experimental data solution buffer on some solution. 10. Students can either though and analyzing experimental data buffer solution. 11. Students can infer properties of the solution by the addition of slightly acids, bases or dilution. 12. Student can determine the pH of the solution buffer. 13. Student can determine graph relationship change pH on titration acid alkali for explain nature solution buffer. 14. Student can presented result trial use system correct language.V. Learning Materials Components of a buffer solution Buffer solution can be prepared by mixing a weak acid with its conjugate base or a weak base with its conjugate acid. Example: a. acid buffer solution, CH3COOH (aq) + CH3COONa (aq) Data acidic pH buffer solution is determined by calculation based on the equilibrium reaction: HA H + + A- Ka = [H +] [A-] [HA] [H +] = Ka. [HA] [A-] Note: [HA] = concentration of acid [A-] = concentration of salt b. alkaline buffer solution, NH3 (aq) + NH4Cl (aq) Data alkaline pH buffer solution were determined by calculation based on the equilibrium reaction: MOH M + + OH- Ka = [M +] [OH-] [MOH] [OH-] = Ka. [MOH] [M +] Note: [MOH = concentration of base [M +] = concentration of salt How a buffer solution If the acid is added, the H + ions and the acid will react with ions to form CH3COOH CH3COO-pH so prices are likely to remain. If a base is added, the OH-ions will be neutralized by CH3COOH, pH so prices are likely to remain The nature of the buffer solution The nature of the buffer solution is to maintain the pH value if : To a solution buffer was added a bit of acid or base. The solution was dilutedVI. Learning Method The method used is scientific approach SETS Guided Inquiry Learning Model Discussion, task, exercisesVII. Learning Resources

Michael Proto, Chemistry Class X SMA / MA, grants, Jakarta Handbook of Chemistry vol 1, Allied Chemical Activity Book Student, and hands out Worksheets

VIII. Learning Media (Media, Equipment, Materials) 1. MediaLCD, laptop, video, pictures, internet, etc2. Equipment and materials

PPT Chemistry Books Module Video

IX. Learning Steps Activity Learning Approach: SETS Approach

Meeting 1 TimeActivity

Introduction15 minutes2. Students respond regards and questions relating to the conditions of teachers and attendance 3. As apersepsi to encourage curiosity and critical thinking, the teacher asked a question about blood and its properties. 4. Teachers motivate students to show the video "Blood role in maintain blood " 5. Students receive information competence, material, purpose, benefits, and lessons that will be implemented 6. Teachers collect oral reading tasks and search for articles about a buffer solution7. The teacher asks task read literature about application nature solution blood in life daily 8. The teacher divides teachers into group large

Core activities 60 minutes inutes

1. Student asked analyze literature on buffer solution. 2. Teachers m engajukan question whether all solutions can maintain its pH? Why a solution can maintain its pH? What are the benefits of a buffer solution in body creature life? 3. The teacher gives material early about understanding solution buffer and its properties 4. Teachers provide data results experiment about solution buffer and memberika n example way determine the pH of the solution buffer. 5. Student requested for determine the pH of the data results experiments. 6. Students discuss result task read 7. The teacher asks student present result discussion

Closing15 minutes

Teachers with students to make inferences about solution nature solution buffer and way determination pH. The teacher asks student search literature about role buffer in life day-to-day Teachers with students to make inferences about the discussion. The teacher asks student learn experiment solution buffer for activity laboratory

Meeting 2TimeActivity

Introduction15 minutes ( Phase I : Orientation of students to the problem )a. Teachers deliver the learning objectives ( KD and indicators )b . Teachers give a pretest to determine students' prior knowledge of the material to be coveredc . Teachers motivate students by way of delivering usability buffer material in everyday life and do apperception .d . Teachers pose problems in daily life related to the buffer material.

Core activities 60 minutes

( Phase II : Organizing students to learn ) a. The teacher organizes students into each group .b . The teacher instructed the students to open a worksheet that has distributed 01 .c . The teacher gives instructions to students on how to work on the problems posed in the LKS 01 .( Phase III : Guiding investigation of individual and group ) a. Teachers help students define and organize tasks to be performed as set out in its LKS respectively ( LKS/XI-2/LP/01 ) in groupsb . The teacher directs students to conduct research in the theory of the issues expressed in the article O - FISH in LKS 01 by utilizing the students as well as other reference books that are relevant to the task at handc . Teachers guide students to create a temporary answer ( hypothesis ) of the issues expressed in the article O - FISH in LKS 01 .( Phase IV : Developing and presenting the works ) a. Teachers provide guidance in order to do brainstorming in groups to answer all pertanyanyaan in LKS 01 .b . Teachers check the work of each group before it was read in class .( Phase V : Analyze and evaluate the problem-solving process ) a . Directing each group to check back LKS group's workb . One group was appointed to read the group's work in LKS and other groups provide questions / comments / input .c . The teacher gives the answer reinforcement developed in the discussion .

Closing15 minutes

The final activity ( + 5 min )a. Teachers provide an appreciation of the report of the discussion that has been collected by each groupb . Teachers submit action plan at the next meeting .

Meeting 3TimeActivity

Introduction15 minutes Students respond regards and questions relating to the conditions of teachers and attendance. Teachers charge task report as result psychomotor and cognitive.

Core activities 60 minutes

The teacher told student for presented result report according to dated. Other students scrutinize and prepare question for student presentations. Teachers see course process presentation and answer question

Closing15 minutes

Teachers with students to make inferences about activity presentation. The teacher asks student work questions exercise in LKS.

X. ValuationWorksheet 01: BUFFER SOLUTION

LKS buffer (BUFFER) Objectives: Studying the nature of the buffer solution and not the addition of a little acid buffer, bases, or dilution. Theory: Most of the metabolic processes in living organisms takes place at pH constant. Enzymes work well in certain pH. Bacteria multiply at pH particular. Blood pH is relatively constant at 7.4. To maintain the pH of the solution to prevent changes are striking, use substances that are buffers. Buffer solution is a solution that containing a weak acid with its salt, or a weak base with its salt. Tools and Materials: Test tubes (4) and the rack M NaCl solution CH3 solution COONa 0.1 M Pipette 4 HCl solution solution of NH3 0.1 M 10 ml measuring cup (1) M NaOH solution solution of NH4 Cl 0.1 M Universal indicator solution of CH3 COOH 0.1 M distilled water 100 ml beaker (1)

Procedure. 1. Insert the 5 ml of H2O into the reaction tube. Give 1 sheet indicators universal. Record the pH prices. Divide the solution into 2 and enter into test tube. 2. Into the first test tube, Adding 2 drops of 0.1 M NaOH Record the pH prices. 3. Into the second test tube, add 2 drops of HCl 0.1 M. Record the pH prices. 4. Put to the test tube 2 ml CH3 COOH + 2 ml of 0.1 M CH3 COONa 0.1 M5. Calculate the pH, then the solution is divided into 2 pieces of test tubes 6. Into the first test tube, add 2 drops of 0.1 M NaOH, calculate the pH of its 7. Into the second test tube, add 2 drops of 0.1 M HCl, calculate the pH of its 8. Put to the test tube 2 ml of NH4 OH + 2 ml of 0.1 M NH4 Cl 0.1 M 9. Calculate the pH, then the solution is divided into 2 pieces of test tubes 10. Into the first test tube, add 2 drops of 0.1 M NaOH, calculate the pH of its 11. Into the second test tube, add 2 drops of 0.1 M HCl, calculate the pH of its

Observation

pHH2O+ NaOH+ HCl

First.....________

mix___..........

a.

b. pHCH3COOH + CH3COONa+ NaOH+ HCl

First.....________

mix___..........

c. pHNH4OH + NH4Cl+ NaOH+ HCl

First.....________

mix___..........

Question. 1. Solution of NH4OH + NH4Cl called buffer solution ....... 2. Solution of CH3COOH + CH3COONa buffer solution called ....... 3. Give the conclusion of the experiment above.

A. Answer the question below correctly! 1. What is a buffer solution? 2. Provide an example of a buffer solution in everyday life! 3. Stand is divided into 2. Explain! 4. Describe the properties of a buffer solution? B. Choose one best answer! 5. Among the mix below includes buffer solution, except ....

a. NH4OH and NH4Cl b. HCN and KCN c. CH3COOH and CH3COONa d. H2CO3 and KHCO3 e. Ca(OH)2 and CaCl2

6. The function of the buffer solution in the blood system is to maintain .....

a. Blood acidity b. fibrionogen blood .. c. Blood Hb d. White blood cells from blood e. Red blood cells from blood

7. Some solution reacted as follows. (1) 100 ml of 0.1 M acetic acid and 100 ml of 0.1 M NaOH (2) 100 ml of 0.2 M acetic acid and 100 ml of 0.1 M NaOH (3) 100 ml of 0.1 M hydrochloric acid and 100 ml of NH 4 OH 0.1 M (4) 100 ml of 0.05 M hydrochloric acid and 100 ml of NH 4 OH 0.1 M Mixture on top of which forms a buffer solution is

a. (1), (2), and (3) b. (4) c. (1) and (3) d. all solution e. (2) and (4)

scores obtained Value = --------------------------- x 100 maximum score

XI. AssessmentAttitudes and Skills Assessment process experimental data include:1. Spiritual Attitudea. Technique: Observationsb. Help Instruments: Observation Sheetc. Grating:No.Attitude / ValueItem Instrument

1Realizing that all the gifts of God AlmightyBe grateful

2Realizing that God Almighty will provide conveniencePray prev and after doing something

2. Social Attitudesa. Technique: Observationsb. Help Instruments: Observation Sheetc. Grating:No.Attitude / ValueItem Instrument

1Honesty Not cheating during a test. Not plagiarism. Do not steal from friends.

2Discipline Arrive on time Tasks on time Orderly, obedient Dressed and well groomed

3Responsibility Return the borrowed items Doing a good job Accept the risk of acts committed

3. Knowledgea. Technique: Observationsb. Help Instruments: Observation Sheetc. Grating:No.Attitude / ValueItem Instrument

1Curiosity Able to answer questions Being able to predict the solubility of the precipitate in Being able to calculate the solubility and solubility results Able to understand the concepts of solubility and solubility product

4. Skilla. Technique: Observationb. Help Instruments: Observation Sheetc. Grating:No.Attitude / ValueItem Instrument

PatientPreparing den tool materials with goodNot in a hurry at the time of trial

Not interfere friendWillingness perform duties in conformity deal

DisciplineOrderly in conducting experiments in laboratory

ResponsibilityReplace if damaged the appliance

ThoroughBe careful when experimenting

NetAlways clean the instrument after use

NeatUsing a lab coat properly

HonestReported experimental data it is

ASSESSMENT PROCESS SHEET

Grade : Date :Instructions : For each behavioral performance following process, mark ()the assessment of the performance of the students using a scale based on the rubric !NoNamePerformance Task Details (RTK) / scoringTotal Score

NeatnessSumming buffer solution properties of practicumDistinguishing buffer solution and not the buffer

432143214321

Total scores obtained Value = --------------------------- x 100 % Total maximum score

Criteria : Very Good (SB) : If 85%