L28 - Solutions A solution is a homogeneous mixture. It...

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Solutions A solution is a homogeneous mixture. It consists of two ``parts’’: Solute - the smaller amount of substance Solvent - the larger amount of substance In this class we talk almost exclusively about aqueous  solutions (i.e. solvent = water) 
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Concentration The amount of solute per unit solution
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     Molarity Solution =  solute  dissolved in  solven t. Solute: present in smallest amount. In this class: water as solvent =  aqueous  solutions. Concentration:  measure of the amount of solute present in a unit  of solution. Concentration can be specified in different units. In this  class we use units of  Molarity (M) . Molarity: moles of solute per liter of solution. Important feature of molarity: what counts is the solution volume,  NOT the solvent volume. Solution Concentration g
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    Laboratory preparation of molar solutions. Figure 3.12 A    Weigh the solid needed. Transfer the solid to a  volumetric flask that contains  about half the final volume of  solvent. B    Dissolve the solid  thoroughly by swirling. C    Add solvent until the solution  reaches its final volume.
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  Sample Problem 3.13 Calculating the Molarity of a Solution PROBLEM: Glycine (H 2 NCH 2 COOH) is the simplest amino acid.  What is the  molarity of an aqueous solution that contains 0.715 mol of glycine in  495 mL? mol of glycine  concentration(mol/mL) glycine  molarity(mol/L) glycine SOLUTION: PLAN: Molarity is the number of moles of solute per liter of solution. 0.715 mol glycine
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This note was uploaded on 04/20/2008 for the course CHEM 111 taught by Professor Grzegorz during the Spring '08 term at Colorado State.

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L28 - Solutions A solution is a homogeneous mixture. It...

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