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Unformatted text preview: oxide Potassium hydroxide Barium hydroxide COMMON WEAK ACIDS & BASES HC2H3O2 H2CO3 HF HCN H2S Acet ic acid Carbonic acid Hydrofluoric acid Hydrocyanic acid Hydrosulfuric acid NH3 CO(NH2)2 2 Ammo nia Urea Chemistry 52 Chapter 15 BRØNSTEDLOWRY ACIDS & BASES
· The Arrhenius definit io n of acids and bases is limited to aqueous solutions.
· A broader definit io n of acids and bases was develo ped by B rønsted and Lowry in t
the early 20 h century.
· According to BrønstedLowry definit ion, an acid is a proton donor, and a base is a proton acceptor. HCl (g) + H 2 O (l) ¾¾ H3 O+ (aq) + Cl (aq) ®
(Acid) (Base ) NH3 (aq) + H 2 O (l) ¾¾ NH + (aq) + OH (aq) ®
(Base) (A )
cid · A substance that can act as a BrønstedLowry acid and base (such as water) is called amphiprotic.
· In BrønstedLowry definit ion, any pair of mo lecules or ions that can be int...
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