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Lecture #6

# Lecture #6 - Chemistry 2A-c w2009(Ch4-6)41 Chemical...

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Solution Terminology Solvent : Substance in greatest proportion Solute : All other substances in solution Aqueous Solution : Water is the solvent Saturated : contains the maximum amount of dissolved solute the solution can hold Unsaturated Supersaturated Solubility of solute : amount of solute required to reach a saturated solution Chemistry 2A Chemistry 2A -c w2009 c w2009 (Ch4 (Ch4 -6)41: 6)41: Chemical Reactions Chemical Reactions III. Chemical Reaction in solution

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Chemistry 2A Chemistry 2A -c w2009 c w2009 (Ch4 (Ch4 -7)42: 7)42: Chemical Reactions Chemical Reactions Concentration of Aqueous Solutions Mass % One way of expressing the concentration of a solute in a solution is to report the % by mass. If we have 5.00 g of NaCl dissolved in100.0 g of water, we can calculate the % by mass . Mass % for NaCl = (5.00 g NaCl)x100/(105 g) = 4.76% Because of the convenience of measuring volumes of liquids, certain quantities of chemical are measured by determining their volume. A solution consists of one or more solutes (minor component) dissolved in a solvent (major component). Concentrations of solutions are expressed in moles of a solute in a certain volume of solution . Molarity (M) ( mol of solute/L of solution) The # of moles of solute per liter of solution
Chemistry 2A Chemistry 2A -c w2009 c w2009 (Ch4 (Ch4 -8)43: 8)43: Chemical Reactions Chemical Reactions Example : We can calculate the molarity of the NaCl solution above. We need to

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Lecture #6 - Chemistry 2A-c w2009(Ch4-6)41 Chemical...

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