CH 3-2: Acid/Base equilibrium; pKa’s

Slides:

Advertisements

Similar presentations

Acids and Bases.

Advertisements

Weak Acids A weak acid does not ionize completely to form hydrogen ions. e.g.HC 2 H 3 O 2 (aq ) H + (aq) + C 2 H 3 O 2 - (aq) 1.3% K a = [H + (aq) ] [H.

Chapter 19 Self-Ionization of Water and pH. Strong vs. Weak Strong: 100% dissociation of H + or OH – – Strong electrolytes (conduct electricity very well)

1 Acetic acid, has a K a of 1.7 x Determine the pH of a 0.10 M solution of acetic acid. Hint: First write out the equilibrium expression of the.

Applications of Aqueous Equilibria

Chemistry 130 Acid and Base equilibria Dr. John F. C. Turner 409 Buehler Hall

Copyright©2000 by Houghton Mifflin Company. All rights reserved. 1 Models of Acids and Bases Arrhenius Concept: Acids produce H + in solution, bases produce.

Slide 1 of 52  Ch.16. Acids and Bases (the fundamentals)

Modern Chemistry Chapter 15 Acid-Base Titration and pH

Nomenclature or names of compounds Alkanes. Nomenclature or names of compounds Alkanes.

Students should be able to: 1. Identify strong electrolytes and calculate concentrations of their ions. 2. Explain the autoionization of water. 3. Describe.

Chapter 16: Applications of Aqueous Equilibria Renee Y. Becker Valencia Community College 1.

ACIDS AND BASES …for it cannot be But I am pigeon-liver’d and lack gall To make oppression bitter… Hamlet.

Maths and Chemistry for Biologists

Copyright©2000 by Houghton Mifflin Company. All rights reserved. 1 Models of Acids and Bases Arrhenius Concept: Acids produce H + in solution, bases produce.

PART 3: Weak Acids & Bases Unit 08 IB Topics 8 & 18 Chapters 14 & 15.

Chapter 16 Acid-Base Equilibria. Dissociation of water Autoionization or autoprotolysis Ion-product constant Autoprotolysis constant constant.

Acid and Base Equilibria Electrolytes Strong Conduct electricity Weak Poor conductors of electricity Nonelectrolytes Do not conduct electricity.

Acid-base equilibrium

Acids and Bases - the Three Definitions 1.Measurement of pH - the pH meter 2.Bronsted-Lowry definition of acids and bases - an acid is a proton donor -

1 Acids, Bases and PH. 2 Some Properties of Acids þ Produce H + (as H 3 O + ) ions in water (the hydronium ion is a hydrogen ion attached to a water molecule)

Chapter 18 – Acids, Bases, and Salts. Arrhenius (ah-ray-nee- uhs) definition Acid – substance that dissociates in water to produce hydrogen ions (H +

Chapter 19 - Reactions of Acids and Bases. Water is amphoteric - can act as either an acid or base H 2 O H + + OH - (acting as acid) H 2 O H + + OH -

Acids and Bases Chapter 14. Classifying Acids Organic acids contain a carboxyl group or -COOH -- HC 2 H 3 O 2 & citric acid. Inorganic acids -- HCl, H.

Carboxylic Acids Carboxylic acids contain a carboxyl group: O CH 3 C-O-H ORCH 3 CO 2 H Carboxyl group.

Acids and Bases Dr. Ron Rusay Spring 2004 © Copyright R.J. Rusay.

Chapter 7 Acids and Bases; Intermolecular Attractions.

The Strong vs. The Weak The Jekyl and Hyde of Acids and Bases.

Acid Base Equilibria Chapter 16 part II. Write the Dissociation Reaction for the following: A. HCl A. HCl B. Acetic Acid B. Acetic Acid C. Ammonium ion.

Ch Acids & Bases II. Strength of Acids & Bases (p )  Strong vs. Weak  pH.

Ch 8: Introducing Acids and Bases. pH of precipitation in the United States 2001, and in Europe as reported in 2002.

Dr. S. M. Condren Chapter 15 Acids and Bases. Dr. S. M. Condren Arrhenius Acid-Base Theory Arrhenius, Svante August ( ), Swedish chemist 1903.

 Calculate the pH of weak acids.  calculate the pH of weak bases.  Calculate the pH of salt of weak acids.  Calculate the pH of salt of weak bases.

Hydrocarbons Properties and Reactions CHEMISTRY 11 MS. MCGRATH.

Models of Acids and Bases Arrhenius Concept: Acids produce H + in solution, bases produce OH  ion. Brønsted-Lowry: Acids are H + donors, bases are proton.

Bronsted-Lowry Acid Base Chemistry Just a few reminders.

Dissociation of water and pH. Hydronium and Hydroxide Water most typically exists as H 2 O, two Hydrogens bonded to a single Oxygen But the polar covalent.

Weak Acids and Bases. “WEAK” Acids and bases that ionize less (much less) than 100% The amount of H 3 O + or OH - in solution is MUCH smaller than the.

Acid-Base Equilibria and Solubility Equilibria Chapter 16 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Unit 12 Weak Acids and Weak Bases. What makes a Weak Acid? Weak acids (covalently bonded H compounds) are ionized by water less than 100% HBrO + H 2 O.

Essential Organic Chemistry

An amphiprotic substance can do either! Strong acid Strong base Weak acid Weak base.

Introduction to Organic and Biochemistry (CHE 124) Reading Assignment General, Organic, and Biological Chemistry: An Integrated Approach 3 rd. Ed. Ramond.

Acid/base chemistry Buffers Henderson-Hasselbalch equation.

An Introduction to Organic Reactions and Their Mechanism Acids and Bases.

Chapter 1 Lecture Introduction and Review Organic Chemistry, 8 th Edition L. G. Wade, Jr.

Ch. 14: Acids and Bases 14.1 Intro to Acids and Bases 14.2 Acid Strength 14.3 pH Scale.

Aqueous Acid-Base Equilibria

WARM UP What is the pH of a M weak acid (HA) solution that is 8.2% ionized?

4.6 Acids and Bases: General Principles

University of California,

CHE2060 Lecture 5: Acid-base chemistry

Topic: Acids and Bases (Part 2)

Unit 0 Nomenclature.

CHE2060 Lecture 5: Acid-base chemistry

Acid/ Base Definitions

Strong and Weak Acids and Bases

Acids and bases.

Ch. 3 – Organic Transformations, Acidity & Basicity

Chapter 16 Acids & Bases.

Strength of Acids & Bases Strong vs. Weak pH

Strength of Acids & Bases Strong vs. Weak pH

Chapter 14 Acids & Bases.

Chapter 10 STRUCTURE AND SYNTHESIS OF ALCOHOLS

Models of Acids and Bases

Models of Acids and Bases

AP Chem Today: Strong vs. Weak Acid Calculations Acid/Base Equilibrium.

Acids and Bases Chemistry 1106.

Important Definitions and Ideas

Presentation transcript:

CH 3-2: Acid/Base equilibrium; pKa’s What is “pKa”? pKa = -log Ka ??? ??? acid base conj. base conj. acid Let’s think of the pKa as an acid’s “affinity” for protons….. pKa range <0 - 35 strong acid…………..weak acid Ka range 103 - 10-35 strong acid weak acid

Characterizing acid strength: pKa scale (0 – 35) pKa < 2…….....strong acid (“inorganic acids”) pka ~ 5…...…..moderate acid (carboxylic acids) pKa 7 – 16……weak acids (ammonium ion, alcohols, water) pKa 25 – 35…..very weak acids (ammonia, amines, alkynes) pKa > 35……....little ionization in water (alkenes, alkanes)