Week 12 - UA GenChem General Chemistry General Chemistry...

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Unformatted text preview: UA GenChem General Chemistry General Chemistry CHEM 151 CHEM 151 Week 12 UA GenChem Aqueous Solutions A var iety of molecular and ionic compounds ar e soluble in water . Their solubility depends on the str ength of the inter molecular for ces between par ticles in the system. A solution is an homogeneous mixtur e of a: solute , (the substance that has been dissolved), and the solvent , (the substance in which the solute has been dissolved). solvent solute UA GenChem Solubility: Molecular Compounds Solubility depends on the r elative str ength between inter molecular for ces between molecules of differ ent types and molecules of the same type. UA GenChem Solubility and H -bonding H -bond H -bond-- δ δ + + δ δ-- δ δ N H N H 3 3 in H in H 2 O O H -bond H -bond-- δ δ + + δ δ-- δ δ 2 H -bonding plays a centr al r ole in the solubility of many molecular compounds in water . UA GenChem I n gener al, inter molecular for ces between polar molecules ar e str ong, so a polar substance will mix with a polar substance ( POLAR DI SSOLVES POLAR ) . Water H 2 O Methanol CH 3 OH H 2 O + CH 3 OH The mixture is “ MI SCI BLE ” or soluble in all proportions Polar with H-bonding Polar with H-bonding Miscible mixture Solubility: Polar Compounds UA GenChem Alcohols and Water Name Formula Solubility (g/ 100g H 2 O @20°C) methanol CH 3 OH miscible ethanol C 2 H 5 OH miscible...
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This note was uploaded on 02/05/2011 for the course CHEM 151 taught by Professor Staff during the Fall '08 term at Arizona.

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Week 12 - UA GenChem General Chemistry General Chemistry...

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