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There are 3 theories… Arrhenius (most common) Bronsted-Lowry Lewis
Arrhenius Bronsted-Lowry Lewis Theory includes more chemical reactions.
Arrhenius (most common): an acid gives H + and a base gives OH - Hydrochloric acid H + + Cl - Sodium hydroxide Na + + OH -
But NH 3 in water is basic.. NH 3 + H 2 O NH 4 + + OH - base acid proton acceptor proton donor
Conjugate Acid Conjugate Base
Bronsted-Lowry: an acid is a proton (H + ) donor and a base is a proton acceptor
Bronsted base acid Bronsted acid base
Bronsted base acid Bronsted acid base
Bronsted base acid Bronsted acid base AMPHOTERIC
But what if no protons are being donated or accepted?
What is being donated and accepted?
Electron Pair Acceptor Electron Pair Donor Lewis Acid Lewis Base
Lewis: An acid is an electron pair acceptor and a base is an electron pair donor
Here’s another example…
Use HCl (g) + H 2 O to show all three theories.
Acid-Base Theories Section 20.3
Chemistry Notes Acid/Base Theories. There are three ways to define acids and bases. This reflects the fact that science is always revising itself.
Brønsted-Lowry Model Acids - proton (H + ) donors Bases – accepts proton (H + )
Tonight’s homework: Read pages Do practice problems 1 & 2.
Aim: How did Bronsted describe acids and bases? Do Now: 1.Take out a calculator and reference tables. 2.How did Arrehnius define an acid and a base?
ACID/BASE Theories & Review
Brønsted/Lowry acid: a proton donor proton donor?... a proton is also an H + ion in water, H 2 O + donated H + H 3 O + H 3 O + = “hydronium ion”
ACIDS AND BASES. Additional KEY Terms HydroxideHydronium Outline the historical development of acid base theories. Include: Arrhenius, Bronsted-Lowry,
Chapter 20 Section 3 monoprotic acid- contains one ionizable H ex- HNO 3 diprotic acid- contains two ionizable H ex- H 2 SO 4 triprotic acid- contains.
Acids and Bases. Acids from the Latin word acere “ sharp ” or “ sour ” taste sour (but you wouldn ’ t taste an acid to see) change litmus paper red.
ACIDS AND BASES.
Definitions of Acids and Bases
Sec. 18.1: Acids & Bases: An Introduction
NOTES: 19.1 – Acid-Base Theories
Extending Acid/Base Concepts 1 a) proton, hydronium, H 3 O + b) all release H + : mono = releases 1 H +, poly = more than 1, di = two, tri = three c) Neutralization.
Conjugate Acid-Base Pairs. Acid Dissociation Kelter, Carr, Scott, Chemistry A World of Choices 1999, page 280 HCl Conjugate base Acid Conjugate pair +
Brønsted-Lowry theory of acids and bases An acid is a H + donorHCl A base is a H + acceptorNH 3 H + Cl - + NH 3 Cl - + NH 4 + H + is transferred Note:We.
Acids and Bases Unit 12. Properties of an Acid Sour taste Turns litmus paper red (and responds uniquely to other indicators) Reacts with: Hydroxide.
Acids and Bases Acid-Base Theories. Objectives Define and recognize Brønsted-Lowry acids and bases Define a Lewis acid and a Lewis base Name compounds.
Hosted by Mrs. Miller Definitions Naming NeutralizationsMiscellaneous
Acid-Base Theories The “Boyz”. Acid and Base Theories2 Arrhenius Theory of Acids Acid: molecular substances that breaks-ups in aqueous solution into H+
1. Comments on Test 2. Section 16.1A – Acids and Bases 3. Homework: pg 589, #2, 3, 7, 8, 9, 10 Wednesday, March 12, 2008.
1 - Alternate Acid Base Theory Mr. ShieldsRegents Chemistry U15 L02.
Review Acids and Bases. Acids taste ______ and bases taste _______? Sour, bitter.
Different models help describe the behavior of acids and bases. Section 1: Introduction to Acids and Bases K What I Know W What I Want to Find Out L What.
Review: Arrhenius Definition of Acids and Bases Acids produce H + in aqueous (water) solutions Acids produce H + in aqueous (water) solutions water water.
CHALLENGE 1. KEY QUESTIONS How do we define an acid? How do we define a base?
Copyright © Cengage Learning. All rights reserved.15 | 1 Brønsted–Lowry Concept of Acids and Bases The Brønsted–Lowry concept expands the compounds that.
Chemistry Daily 10’s Week Acids react with a. bases to produce salts and water. b. salts to produce bases and water. c. water to produce bases.
Acid-Base Theories. In 1887, a Swedish chemist, Svante Arrhenius, published a paper concerning acids and bases. In 1887, a Swedish chemist, Svante Arrhenius,
8.4 Acid-Base Theories. Recall: Arrhenius’ TheoryAcids: Arrhenius theory Arrhenius theory: Any substance that, when dissolved in water, increases.
Classifying Acids and Bases. Acid and Base Theories There are different ways of defining what an acid and base is 1. Arrhenius 2. Bronstead Lowry.
Chapter: 8 Acids and Bases Title: Lesson 1 Theories of Acids and Bases Learning Objectives: – Reflect on prior knowledge of acids and bases – Understand.
Pg ◦ Tastes sour ◦ Corrosive to metals ◦ Electrolytes: break into ions when dissolved in water ◦ React with blue litmus and indicators.
Bases Sodium hydroxide Preferred IUPAC name Sodium hydroxide Systematic name Sodium oxidanide Other names Caustic soda Lye Graphics Source: Wikipedia.
What are Acids and Bases ? There are three main theories to describe what acids and bases are In general each theory widens what chemical reactions can.
Lewis Acids “An acid is an electron pair acceptor,
Acid and Base Ch 15 and acids 1. tastes sour. 2. conducts an electric current. 3. Causes certain dyes ( indicators) to change color. 4. Liberates.
Acids and Bases Chemistry 12. Arrhenius Definition of an Acid An acid has a sour taste (ex: vinegar, citric acid) and when placed in water to become an.
The Chemistry of Acids and Bases. Acids and Bases: Theories At the conclusion of our time together, you should be able to: 1. Explain the 3 different.
Chapter 8.3b. Neutralization: reaction between an acid and a base Neutralization reaction produces a salt and water. Salt The negative ions in.
Introduction to Acids and Bases AP Chemistry
ACID-BASE THEORIES Svante ArrheniusJohannes BrönstedThomas Lowry.
16/10/2015 Acids and Bases Hydrochloric acidCitric acidWater An acid is a “proton donor”: A base is a “proton acceptor”: H Cl H +- H O Na H O - + Sodium.
ACIDS AND BASES
Preview Lesson Starter Objectives Brønsted-Lowry Acids and Bases Monoprotic and Polyprotic Acids Lewis Acids and Bases Chapter 14 Section 2 Acid-Base Theories.
Acids & Bases. Properties of Acids & Bases Acids Aqueous solutions of acids have a sour taste Turn blue litmus paper to red React with metals to produce.
Acid and Base Definitions Objectives: 1. State the Bronsted-Lowry definition of acids and bases. 2. Identify the common physical and chemical properties.
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