Chapter 14 Preview Lesson Starter Objectives Acids Bases

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Presentation transcript:

Chapter 14 Preview Lesson Starter Objectives Acids Bases Arrhenius Acids and Bases

Relationship of [H3O+] to [OH–] Section 1 Properties of Acids and Bases Chapter 14 Relationship of [H3O+] to [OH–]

Chapter 14 Preview Lesson Starter Objectives Section 2 Acid-Base Theories Chapter 14 Preview Lesson Starter Objectives Brønsted-Lowry Acids and Bases Monoprotic and Polyprotic Acids Lewis Acids and Bases

Chapter 14 Lesson Starter Section 2 Acid-Base Theories Chapter 14 Lesson Starter List three terms that describe the person in the photo. The person has been described in many different ways, but he or she is still the same person. Acids and bases also can be described differently based on the circumstances.

Section 2 Acid-Base Theories Chapter 14 Objectives Define and recognize Brønsted-Lowry acids and bases. Define a Lewis acid and a Lewis base. Name compounds that are acids under the Lewis definition but are not acids under the Brønsted-Lowry definition.

Brønsted-Lowry Acids and Bases Section 2 Acid-Base Theories Chapter 14 Brønsted-Lowry Acids and Bases A Brønsted-Lowry acid is a molecule or ion that is a proton donor. Hydrogen chloride acts as a Brønsted-Lowry acid when it reacts with ammonia. Water can act as a Brønsted-Lowry acid.

Brønsted-Lowry Acids and Bases, continued Section 2 Acid-Base Theories Chapter 14 Brønsted-Lowry Acids and Bases, continued A Brønsted-Lowry base is a molecule or ion that is a proton acceptor. Ammonia accepts a proton from the hydrochloric acid. It acts as a Brønsted-Lowry base. The OH− ion produced in solution by Arrhenius hydroxide bases (NaOH) is the Brønsted-Lowry base. The OH− ion can accept a proton

Brønsted-Lowry Acids and Bases, continued Section 2 Acid-Base Theories Chapter 14 Brønsted-Lowry Acids and Bases, continued In a Brønsted-Lowry acid-base reaction, protons are transferred from one reactant (the acid) to another (the base). acid base

Brønsted-Lowry Acids and Bases Section 2 Acid-Base Theories Chapter 14 Brønsted-Lowry Acids and Bases Click below to watch the Visual Concept. Visual Concept

Monoprotic and Polyprotic Acids Section 2 Acid-Base Theories Chapter 14 Monoprotic and Polyprotic Acids A monoprotic acid is an acid that can donate only one proton (hydrogen ion) per molecule. HClO4, HCl, HNO3 only one ionization step

Monoprotic and Polyprotic Acids, continued Section 2 Acid-Base Theories Chapter 14 Monoprotic and Polyprotic Acids, continued A polyprotic acid is an acid that can donate more than one proton per molecule. H2SO4, H3PO4 Multiple ionization steps (1) (2) Sulfuric acid solutions contain H3O+, ions

Monoprotic and Polyprotic Acids, continued Section 2 Acid-Base Theories Chapter 14 Monoprotic and Polyprotic Acids, continued A diprotic acid is the type of polyprotic acid that can donate two protons per molecule H2SO4 A triprotic acid is the type of polyprotic acid that can donate three protons per molecule. H3PO4

Monoprotic and Diprotic Acids Section 2 Acid-Base Theories Chapter 14 Monoprotic and Diprotic Acids

Comparing Monoprotic and Polyprotic Acids Section 2 Acid-Base Theories Chapter 14 Comparing Monoprotic and Polyprotic Acids Click below to watch the Visual Concept. Visual Concept

Chapter 14 Lewis Acids and Bases Section 2 Acid-Base Theories Chapter 14 Lewis Acids and Bases A Lewis acid is an atom, ion, or molecule that accepts an electron pair to form a covalent bond. The Lewis definition is the broadest of the three acid definitions. A bare proton (hydrogen ion) is a Lewis acid

Lewis Acids and Bases, continued Section 2 Acid-Base Theories Chapter 14 Lewis Acids and Bases, continued The formula for a Lewis acid need not include hydrogen. The silver ion can be a Lewis acid Any compound in which the central atom has three valence electrons and forms three covalent bonds can react as a Lewis acid.

Chapter 14 Lewis Acids and Bases Section 2 Acid-Base Theories Click below to watch the Visual Concept. Visual Concept

Lewis Acids and Bases, continued Section 2 Acid-Base Theories Chapter 14 Lewis Acids and Bases, continued Acid Base Definitions

Comparing Arrhenius, Brønsted-Lowry, and Lewis Acids and Bases Section 2 Acid-Base Theories Chapter 14 Comparing Arrhenius, Brønsted-Lowry, and Lewis Acids and Bases Click below to watch the Visual Concept. Visual Concept