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MULTIPLE CHOICE NUMBERS 1-5

MULTIPLE CHOICE NUMBERS 1-5

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter20: Molecular Spectroscopy And Photochemistry
Section: Chapter Questions
Problem 67CP
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MULTIPLE CHOICE NUMBERS 1-5

Code #: Grade & Section: Name: Name of Teacher: 0.4 MODULE 2: ACID- BASE EQUILIBRIA & BUFFER SOLUTIONS Module Overview: This module is the continuation of the study of acid-base reactions with a discussion of buffer action. We will also look at another type of aqueous equilibrium - that between slightly soluble compounds and their ions in solution. This module discusses about the acid-base equilibrium and its applications to the pH of solutions and the use of buffer solutions. Learning Competencies: At the end of this module, you can: 1.Define Bronsted acids and bases (STEM_GC11ABIVS-g-153); 2.Discuss the acid-base property of water (STEM_GC11ABIVJ-g-154); 3.Calculate pH from the concentration of hydrogen ion or hydroxide ions in aqueous solutions (STEM_GC11ABIVJ-g-156); 4. Describe how a buffer solution maintains its pH (STEM GC11ABIVS-g-160)3; 5. Calculate the ph of a buffer solution using the Henderson Hasselbalch equation (STEM_GC11ABIVJ-g-161). Instructional Materials: 1. Bayquen, A. V, Pena, Gardee (2016). Senior High School General Chemistry 2.Phoenix Publishing House, Inc. Quezon City. pp. 104-140 Values: Academic proficiency Pre-assessment Directions: Read the following questions below. Circle the letter that corresponds to the correct answer. 1. A-Brønsted-Lowry acid is any species capable of: A. Accepting a proton C. Exchanging a proton 2. A Brønsted-Lowry base is any species capable of: A. Accepting a proton C. Exchanging a proton 3. All the given are properties of an acid, except: B. pH <7 B. Donating a proton D. All of the above B. Donating a proton D. All of the above C. pH >7 D. Changes the color of litmus from blue to red A. A. Taste sour 4. All the given are properties of a base, except: L> Hd C. Tastes bitter B. pH>7 D. Feels slippery 5. Depending on the circumstances, water can act as either an acid or base. The termfor this characteristic of water is called: A .Amphiprotic C. Amphoteric B. Amphotoric D. Amphotic INTRODUCTION TRIVIA MANIA! Did you know that... Originally, acids and bases were defined by Svante Arrhenius. His original definition stated that acids were compounds that increased the concentration of hydrogen ions (H+) in solution, whereas bases were compounds that increased the concentration of hydroxide ions (OH-) in solutions. Problems arise with this conceptualization because Arrhenius's definition is limited to aqueous solutions, referring to the solvation of aqueous ions, and is therefore not inclusive of acids dissolved in organic solvents. To solve this problem, Johannes Nicolaus Brønsted and Thomas Martin Lowry, in 1923, both independently proposed an alternative definition of acids and bases INTERACTION Page | 1
Transcribed Image Text:Code #: Grade & Section: Name: Name of Teacher: 0.4 MODULE 2: ACID- BASE EQUILIBRIA & BUFFER SOLUTIONS Module Overview: This module is the continuation of the study of acid-base reactions with a discussion of buffer action. We will also look at another type of aqueous equilibrium - that between slightly soluble compounds and their ions in solution. This module discusses about the acid-base equilibrium and its applications to the pH of solutions and the use of buffer solutions. Learning Competencies: At the end of this module, you can: 1.Define Bronsted acids and bases (STEM_GC11ABIVS-g-153); 2.Discuss the acid-base property of water (STEM_GC11ABIVJ-g-154); 3.Calculate pH from the concentration of hydrogen ion or hydroxide ions in aqueous solutions (STEM_GC11ABIVJ-g-156); 4. Describe how a buffer solution maintains its pH (STEM GC11ABIVS-g-160)3; 5. Calculate the ph of a buffer solution using the Henderson Hasselbalch equation (STEM_GC11ABIVJ-g-161). Instructional Materials: 1. Bayquen, A. V, Pena, Gardee (2016). Senior High School General Chemistry 2.Phoenix Publishing House, Inc. Quezon City. pp. 104-140 Values: Academic proficiency Pre-assessment Directions: Read the following questions below. Circle the letter that corresponds to the correct answer. 1. A-Brønsted-Lowry acid is any species capable of: A. Accepting a proton C. Exchanging a proton 2. A Brønsted-Lowry base is any species capable of: A. Accepting a proton C. Exchanging a proton 3. All the given are properties of an acid, except: B. pH <7 B. Donating a proton D. All of the above B. Donating a proton D. All of the above C. pH >7 D. Changes the color of litmus from blue to red A. A. Taste sour 4. All the given are properties of a base, except: L> Hd C. Tastes bitter B. pH>7 D. Feels slippery 5. Depending on the circumstances, water can act as either an acid or base. The termfor this characteristic of water is called: A .Amphiprotic C. Amphoteric B. Amphotoric D. Amphotic INTRODUCTION TRIVIA MANIA! Did you know that... Originally, acids and bases were defined by Svante Arrhenius. His original definition stated that acids were compounds that increased the concentration of hydrogen ions (H+) in solution, whereas bases were compounds that increased the concentration of hydroxide ions (OH-) in solutions. Problems arise with this conceptualization because Arrhenius's definition is limited to aqueous solutions, referring to the solvation of aqueous ions, and is therefore not inclusive of acids dissolved in organic solvents. To solve this problem, Johannes Nicolaus Brønsted and Thomas Martin Lowry, in 1923, both independently proposed an alternative definition of acids and bases INTERACTION Page | 1
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