LESSON PLAN By : Marcia Sri Purwantiningsih & Raya Dewi School: SMA Negeri Subject Matter: Chemistry Topic: Acid - Base Subtopic: Acid-Base theory Grade/semester: XI/ II Time Allocated: 1 x 45 minutes

Standard competency 4.Understanding acid base solution properties, measurement method and its application Basic competency 4.1. Describing acid-base theory by determination of solution properties and calculate pH of solution

Learning Objectives: Through this course, the student is expected to able:  Explaining acid-base definition of Arrhenius  Explaining Bronsted-Lowry theory of acids-bases  Explaining Lewis theory of acids-bases.  Writing acid-base reaction according to Bronsted and Lowry and indicating conjugated acid-base pair

The Model, Approach, and Method on Learning Model: Constructivism Strategi: Cooperative learning type Group Investigation Approach: Concept and process skill approach Method : Demonstration, discuss, information concept

Teaching-Learning Processes Introduction Preknowledge : Do you still remember about the electrolyte solution and what it elektrolite solution? why electrolyte solution can conduct electricity ?. Is there any division in the electrolyte solution and mention.

Introduction Motivation  Teacher demonstrations PP indicators shed on the solution (solution without the label's name). Then the teacher asked the students if this solution try to mention about this musty solution. Write the formula chemical of that solution.  Now, what is acid-base according to acid base Arrhenius theory, Bronsted Lowry theory and Lewis acid base theory ?

Exploration and Elaboration Make work the groups of four people. Then your discussion of worksheet this. Students are discussion about acid-base of Arrhenius theory, Bronsted- Lowry theory, and Lewis theory and then presentation this. Teacher explain about concept acid bases of Arrhenius theory, Bronsted-Lowry theory and Lewis theory. Can you find out the similarities and differences of acid-base theories such ?

Confirmation To better understand the theory of acid base so now I ask you guys to do the practice questions in the book pages 125 Teachers together with students to make conclusions about the theory of acid-base by giving questions. Describe acid-base theory Arrhenius, Bronsted Lowry, Lewis

Closing Learning Source Well, if no problem about this lesson. I hope you do exercise at home and collect at next meeting. Now, We can stop now. Don’t forget to do your homework. See you on the next week.

Assessment Learning Assessment Procedure: Techniques : Written Test Types : Multiple Choice/ Essay Process skill: Presentation, Inferring

Learning Materials Prerequisite material Elektrolite solution Identify acids-bases by indicator Main Concept Acid-base theory : Arrhenius, Bronsted Lowry, and Lewis

Arrhenius Theory

Acid  HCl (aq) + H2O → H3O + (aq) + Cl - (aq)  CH3COOH (aq) + H2O → H3O + (aq) + CH3COO - (aq)  H2SO4(aq) + H2O → H3O + (aq) + HSO4 - (aq)  According to Arrhennius theory, what is meant acid ?

Base  NH3 (aq) + H2O (l)  NH4 + (aq) + OH - (aq)  NaOH (aq) + H2O(l)  Na + (aq) + OH - (aq)  Mg(OH)2 (aq) + H2O(l)  Na + (aq) + OH - (aq)  According to Arrhennius theory, what is meant acid ?

Bronsted-Lowry Model Lowry Bronsted

AH + B → BH + + A - General formula for representing Brønsted- Lowry reactions. AH is acid and B is base HCl (aq) + H2O → H3O + (aq) + Cl - (aq) Hydrochloric acidHydrochloric acid completely reacts with water to form the hydronium and chloride ions CH3COOH + NH3 → NH4+ + CH3COO- Acetic acidAcetic acid as acid reacts incompletely with ammonia. Acetic acid as acid and ammonia as base ammoniaAcetic acidammonia

According to Arrhennius theory, what is meant acid and base?

Determine the species of acids and bases from the reaction below CH 3 COOH + H 2 O === CH 3 COO - + H 3 O + NH 3 + H 2 O === NH OH - CH 3 COO - + H 2 O === CH 3 COOH + OH - NH H 2 O === NH 3 + H 3 O +

Lewis Model