pH_lesson_plan


 * [[file:Acid-Base Theory.ppt]]

Appomattox Regional Governor's School for the Arts and Technology Lesson Plan Guide

Date:** **04.03.07

Subject:** **Chemistry** Lydia R. Murray**
 * Teacher:
 * Teacher:
 * SOL: CH 4g
 * SOL: CH 4g
 * SOL: CH 4g

Grade: 10-12** The student will investigate and understand acid/base theory: strong electrolytes, weak electrolytes, and nonelectrolytes; dissociation and ionization; (pH, pOH).
 * Estimated time: 90 minutes**
 * Objectives:
 * Objectives:
 * Objectives:
 * Objectives:

Assessments: In class work, group presentations, homework, exam (given at a later date).

Materials/Resources: Textbook, SmartBoard, lab materials including peripherals, Sharepoint, internet resources, SOL released versions, //Science Standards of Learning Curriculum Framework,// //Safety in Science Teaching// manual, SOL Test Blueprints and SOL Released Tests, Virginia Standards of Learning Blueprint EOC Chemistry Test (2005).

Differentiation of Instructional and Management Techniques: Lecture / Discussion: Acid/base theory Individual & Group experimentation: pH investigation using color change markers; Pennies in acids/bases. Group analysis of data: Present findings to class. //Method Dimension//: Modeling, Coaching, Articulation, Reflection, Exploration** 1. Student will complete 4 problems in which they calculate pH given the H+ concentration in moles/liter and 4 problems in which they calculate H+ concentration given the pH. 2. Students will complete this**[|**webquest**] **and turn in. Due April 24th. 3. Students will use knowledge gained in the laboratory exercise to create a 4x6 poster for Earth Day. Due April 24th.
 * Homework or Assignment:
 * Homework or Assignment:
 * Homework or Assignment:

Closure:** · Arrhenius acids are characterized by their sour taste, low pH, and they turn litmus paper red. Arrhenius bases are characterized by their bitter taste, slippery feel, high pH, and they turn litmus paper blue. · Bronsted-Lowry-acids are proton donors, whereas, bases are proton acceptors. · 2H2O(l) « H3O+ + OH- · The pH number denotes hydrogen (hydronium) ion concentration. The pOH number denotes hydroxide ion concentration. · pH + pOH = 14 · pH is a number scale ranging from 1-14 that is representative of the acidity of a solution. Molarity = moles/dm3 or moles/L of solution. __Skills:__ · Recognize that acids and bases are defined by several theories. · State the characteristics of acids and bases based on Arrhenius Theory and Bronsted-Lowry Theory · Define pH and pOH · Understand the relationship between pH and pOH. · Explain that strong electrolytes dissociate completely and weak electrolytes dissociate partially. · Utilize pH indicators in the laboratory. · Demonstrate safe laboratory practices, procedures and techniques**
 * **Two important classes of compounds are acids and bases.**
 * **Acids and bases are defined by several theories.**
 * **Acids and bases dissociate in varying degrees.**
 * __Knowledge.__


 * Notes:**
 * **Begin with a KWL on Smartboard. Posted to Sharepoint.(5 minutes)**
 * **PowerPoint presentation on pH. Posted to Sharepoint. (15 minutes)**
 * **Practice calculating pH given H+ concentration in moles/liter. Practice calculating H+ concentration in moles/liter given pH. Create and turn in 2 problems per group for homework. (15 minutes) Posted to Sharepoint. Sent out in mass email after class.**
 * **Pre-lab presentation using Smartboard. (5 minutes)**
 * **Investigation of the pH of a color changing marker without the use of litmus paper or pH peripheral. Testing answer with pH peripheral. Informal presentation to class on findings using Smartboard. (Modification of this** [|**experiment**]**.)**
 * **Investigation of the behavior of pennies in acid. (Modification of this** [|**experiment**]**.)**
 * **Complete** [|**webquest**] **on acid rain. Answer questions and write one to two paragraphs on the main question. Cite sources. Due April 24th.**
 * **Post-lab. Assignment of homework.**
 * **Complete** [|**webquest**] **on acid rain. Answer questions and write one to two paragraphs on the main question. Cite sources. Due April 24th.**
 * **Post-lab. Assignment of homework.**