01 Notes - Intro to Acids and Bases

01 Notes - Intro to Acids and Bases - Acid: any species...

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Aim: How are acids and bases defined? QQ: None Do Now: Brainstorm a list of everything you know about acids and bases. Acid and Base Properties 1. Form electrolytic aqueous solutions 2. Bases taste bitter, acids taste sour 3. Bases (aq) are slippery 4. Acids are corrosive to metals 5. Bases turn red litmus blue, acids turn blue litmus red 6. Acid + Base Salt + Water (neutralization reaction) pH Definition Acids: pH < 7 Base: pH > 7 Arrhenius Definition Acid: a substance that releases H+ ions in an aqueous solution HCl (aq) H + (aq) + Cl - (aq) HCl (aq) + H 2 O (l) H 3 O+ (aq) + Cl- (aq) Base: a substance that releases OH- ion in an aqueous solution NaOH (aq) Na+ (aq) + OH- (aq) Practice: Classify the following as acids or bases. H 2 SO 4 HNO 3 Ca(OH) 2 HBr KOH NH 3 NH 3 cannot be defined using the Arrhenius theory – new definition needed Bronsted-Lowry Definition
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Unformatted text preview: Acid: any species that can donate a proton (H+ ion) proton donor Base: any species that can accept a proton (H+ ion) proton acceptor Practice: Classify the following as acids or bases. CO 3 2-H 3 N CH 3 COOH NO 3-PH 3 BF 3 BF 3 cannot be defined using the Bronsted-Lowry theory new definition needed Lewis Definition Acid: electron pair acceptor Base: electron pair donor Practice: Classify the following as acids or bases: Al 2 Cl 6 + 2Cl 2AlCl 4 AlF 3 + 3F AlF 6 3 2F + SiF 4 SiF 6 2 Conclusions Acids and bases can be defined 3 ways: Arrhenius (middle school definitions) Acids release H+ ions Bases release OH- ions Bronsted-Lowry Acids proton donors Bases proton acceptors Lewis Acids electron pair acceptors Bases electron pair donors...
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01 Notes - Intro to Acids and Bases - Acid: any species...

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