Salt Hydrolysis Lesson 4.

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Presentation transcript:

Salt Hydrolysis Lesson 4

A salt is an ionic compound that: comes from the anion of an acid comes from the cation of a base is formed from a neutralization reaction some neutral; others acidic or basic “Salt hydrolysis” - a salt that reacts with water to produce an acid or base

Salt Hydrolysis A strong acid + a strong base = neutral Salt Hydrolyzing salts that come from: a strong acid + a weak base = acidic a weak acid + a strong base = basic A strong acid + a strong base = neutral Salt a weak acid + a weak base = ?? “Strong” refers to the degree of ionization or dissociation.

Strong Acids HCl Hydrochloric acid HBr Hydrobromic acid HI Hydroiodic acid HNO3 Nitric acid H2SO4 Sulfuric acid HClO3 Chloric acid HClO4 Perchloric acid

Strong Bases Group 2a: Group 1a: LiOH Ca(OH)2 NaOH Sr(OH)2 KOH Ba(OH)2 RbOH CsOH Ca(OH)2 Sr(OH)2 Ba(OH)2

Salt Hydrolysis To see if the resulting salt is acidic or basic, check the “parent” acid and base that formed it. Practice on these: HCl + NaOH H2SO4 + NH4OH H2S + KOH NaCl, a neutral salt (NH4)2SO4, acidic salt K2S, basic salt