Definitions of Acids and BasesAim: What are the three majordefinitions of acids and bases?Summarize the three major definitions ofacids and basesDefine an acid or base according to Arrheniusor Brönsted-Lowry.Determine the acids and bases in a reaction.●NYC Science Scope & Sequence-Chemistry Unit 8 (p151-154)●NYS Chemistry Core Curriculum●NYS Chemistry Reference Tables
Introduction/Launch●Do Now/Motivation: Whichof the following are acid orbases?HCl, LiOH, HF,Ba(OH)2, KCl?How can youtell?HCL: AcidLiOH: BaseHF: AcidBa(OH)2 = BaseKCL: Salt
Any time you see this icon✎in a lightblue box, write your responseAcids & BasesCredit:Edward StevensSource:License:CC 3.0
Introduction/ModelWhat is the theory behind acids andbases?In this lesson, we will discuss the three majorchemical theories involved in defining acidsand bases. They are:1.Arrhenius acids and bases2.Brønsted-Lowry acids and bases3.Lewis acids and basesCredit:Laura GuerinSource:CK-12 Foundation
Introduction/Model1. Arrhenius Acids and BasesSwedish chemist Svante Arrhenius (1859-1927) was thefirst to propose a theory to explain the observedbehavior of acids and bases. Because of their ability toconduct a current, he knew that both acids and basescontained ions in solution. AnArrhenius acidis acompound, which ionizes to yield hydrogen ions (H+) inaqueous solution. The H+ion attaches to the watermolecule, forming a polyatomic ion called the hydroniumion. Thehydronium ion (H3O+)can be thought of as awater molecule with an attached hydrogen ion.In the example on the slide, HCl would be considered anArrhenius acid. This is because when it is mixed withwater, thehydronium ionis formed from H+ions (fromHCl) that dissociated in water.