Chemistry_1311_Test_2 - Chemistry1311Test2 Ch.4...

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Chemistry 1311 Test 2 Ch.4 Polar Molecule:  A molecule with an unequal distribution of charge as a result of its polar bonds  and shape.(135)  Soluble Vs. Insoluble:   Water separates the ions by replacing that attraction with one between  the water molecules and the ions.   By this process, the ions separate and become  solvated , surrounded tightly by solvent  molecules, as they move randomly in the solution. In later cases, the electrostatic attraction  among ions in the compound remains greater than the attraction between ions and water  molecules, so the solid stays largely intact. Actually, these so-called  insoluble  substances do  dissolve to a very small extent, usually several orders of magnitude less than so-called soluble  substances. (136) Elecrolyte:   A substance that conducts a current when dissolved in water.(136) Soluble ionic compounds are called 
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