Lecture_Notes_091409a

Lecture_Notes_091409a - Lecture Note 9/14/2009

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TYPES OF CHEMICAL REACTIONS AND SOLUTION STOICHIOMETRY Zumdahl Chapter 4
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Why solutions y Reactions between ions occur rapidly y All life depends on water y The majority of reactions occur in water
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Definitions y Solvent – the thing doing the dissolving, retains its state y Solute – the thing being dissolved, becomes part of the solvent y Hydrophilic – attracted to water y Hydrophobic – repelled by water
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Definitions y Solubility – the amount of a substance that dissolves in a given volume of solvent at a given temperature y Electrolyte – a material that dissolves in water to give an electrical current y Dilution – adding more solvent to decrease the concentration of a solute in a solution
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Definitions y Polar Molecule – a molecule that has a permanent dipole moment y Salt – an ionic compound y Acid – a proton (H + ) donor y Base – a hydroxide donor or a proton acceptor
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Water
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NaCl dissolving in water
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Lecture_Notes_091409a - Lecture Note 9/14/2009

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