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Topic 9 - Quantitative Description of Aqueous Solutions (STUDY NOTES).docx

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Department
Chemistry
Course
CHEM 1011
Professor
Laura Turculet
Semester
N/A

Description
Topic 9: Quantitative Description of Aqueous Solutions 9.3 General Characteristics of Aqueous Solutions - Many chemical reactions are analyses are carried out in a solution. - Solution o Homogeneous mixture of two or more substances o Consists of solvent (normally the major component) and solute. - An aqueous solution is in which water is the solvent. - A non-aqueous solution describes solutions in which the solvent isn’t water. - Water is an excellent solvent for compounds (as follows) that readily dissolves o Ionic compounds o Many polar molecules - All soluble compounds ionic compounds are strong electrolytes (compounds which don’t form ions in a solution are called non-electrolytes). 9.4 Solution Concentration - Concentration of a solution refers to the amount of a solute dissolved in an amount of solution (unit – mass percent, mole fraction, molarity). - Mass percent, mole fraction, and molarity express proportion of solution relative to the total amount of the sample (solute and solvent), regardless of sample size. 9.5 Mass Percent - Expresses the relative mass of each substance in the mixture as a percentage of the total mixture. 9.6 Mole Fraction (X) -
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