Lec-31-Chap-05-1 - CHE 131 Lecture 31 Reactions in Aqueous...

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CHE 131 Lecture 31 – Reactions in Aqueous Solutions Chapter 5: pp. 165-185. Dissolution of (a) Ionic and (b) Molecular Compounds Table 5-1a, p.166 Table 5-1b, p.166
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Fig. 5-2a, p.167 Fig. 5-2b, p.167 Fig. 5-2c, p.167 Solubility Rules 1. All nitrates are soluble. 2. All compounds of Group IA metals and the ammonium ion, NH 4 + , are soluble. 3. All chlorides are soluble except: AgCl, Hg 2 Cl 2 and PbCl 2 . 4. All sulfates are soluble except: PbSO 4 , BaSO 4 , and SrSO 4 .
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Solubility Rules 5. All hydroxides and sulfides are insoluble except those of the Group IA metals and the ammonium ion. 6. All carbonates and phosphates are insoluble except those of the Group IA metals and the ammonium ion. Precipitation Reactions The process of separating a substance from a solution as a solid. The formation of a solid from solution. The opposite of dissolution. Precipitation of Barium Sulfate BaCl 2(aq) + Na 2 SO 4(aq) 2NaCl (aq) + BaSO 4(s) precipitate Sodium and chloride ions appear on both sides of the equation.
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