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Lecture Series Episode:  8 TEXT BOOK PAGE NUMBER: 99 and 100 Link for part 1    • Bronsted Lowry concept of acids and bases ...   Note: In this video the wordings are same as in the text book. Write Headings on your book. Notes are in description. 7.3 Bronsted – Lowry Concepts of Acids and Bases [Remaining part…for first part watch previous video] Bronsted–Lowry Acid–Base Reaction 1.    According to Bronsted–Lowry, an acid base reaction is that reaction in which a proton is transferred from a proton donor to its acceptor. 2.    This reaction may take place in gas phase or in the presence of any solvent.  Example of HCl and Water Reaction: HCl(g) + H₂O(l) → H₃O⁺(aq) + Cl⁻(aq) 1.    In this reaction, HCl gas acts as an acid because it donates its proton to water which acts as a base.  Example of Ammonia and Water Reaction: NH₃(g) + H₂O(l) ⇌ OH⁻(aq) + NH₄⁺(aq) 1.    Ammonia is a base while water is an acid in this reaction. 2.    Water has the ability to act both as an acid or a base depending upon the other compound with which it reacts.  Amphoteric Nature of Water 1.    Water is therefore called an amphoteric compound which means a compound that can behave both as an acid and a base. 2.    In the reverse reaction, OH⁻ is a base because it accepts a proton donated by the acid NH₄⁺. 3.    In order to differentiate, OH⁻ is called the conjugate base while NH₄⁺ the conjugate acid.  Conjugate Acids and Bases 1.    HCN(aq) + H₂O(l) ⇌ H₃O⁺(aq) + CN⁻(aq) o   HCN = Acid o   H₂O = Base o   H₃O⁺ = Conjugate acid o   CN⁻ = Conjugate base 2.    HI(aq) + H₂O(l) ⇌ H₃O⁺(aq) + I⁻(aq) o   HI = Acid o   H₂O = Base o   H₃O⁺ = Conjugate acid o   I⁻ = Conjugate base   #acids #bases #conceptsofacidsandbases #arrheniusconceptofacidandbase #bronstedlowryconceptsofacidsandbases #interestinginformation #exercise #propertiesofacidsandbases #acidrainanditseffects #keypoints #exercisemcqs #exercisequestionsforshortanswers #exerciseconstructedresponsequestions #exercisedescriptivequestions #exerciseinvestigativequestions #9thchemistryplaylistchapter7 #playlistchapter7chemistry9th #9thclassonlinechemistry