Chpt%2018-1

Chpt%2018-1 - Acids and Bases 18.1 18.3 From Chem I Acids...

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Acids and Bases 18.1 – 18.3
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From Chem I Acids are anything that donates an H + ion in water The H + ion is usually stabilized by a water molecule and is often written as H 3 O + Bases are anything that donates an OH - ion in water We’ll be expanding these definitions
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Fun fact In water both H + and OH - are present in small amounts at all time by the reaction: H 2 O H + + OH - -or- 2 H 2 O H 3 O + + OH - Do you expect a large or small K for this reaction?
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18.1 Acids in water Acids in water undergo disassociation: HCl( aq ) + H 2 O( l ) H 3 O + ( aq ) + Cl - ( aq ) HNO 3 ( aq ) + H 2 O( l ) H 3 O + ( aq ) + NO 3 - ( aq ) CH 3 COOH( aq ) + H 2 O( l ) H 3 O + ( aq ) + COOH - ( aq ) HA ( aq ) + H 2 O( l ) H 3 O + ( aq ) + A - ( aq ) Strong acids disassociate completely, weak acids disassociate to a very small extent
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18.1 Acid Strength Strong Acids: HCl, HBr, HI, HNO 3 , H 2 SO 4 , HClO 4 Weak Acids: Everything else Examples: HClO, CH 3 COOH, HF, HNO, H 3 PO 4
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18.1 Bases in water
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Chpt%2018-1 - Acids and Bases 18.1 18.3 From Chem I Acids...

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