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UOP - CHEM 027 - Class Notes - Week 3

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UOP - CHEM 027 - Class Notes - Week 3

School: University of the Pacific
Department: Engineering
Course: CHEM027
Professor: Dimitry Izotov
Term: Fall 2017
Tags: liquids and solids
Name: Chapter 17 Notes
Description: These notes cover basic concepts and definitions
Uploaded: 03/25/2018
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background image Chapter 17 Properties of Solutions  17.1 Solution Composition  Molarity: the number of moles of solute per liter of solution.   Mass percent: the percent solute by mass in the solution 
Mass Percent = (grams of solute/grams of solution) x 100 
 
Mole Fraction: it’s the ratio of the # of moles of a given component to the total number of moles of 
solution 
 
𝐴 =   𝑋 𝐴 = 𝑛 𝐴 𝑛 𝐴 + 𝑛 𝐵    
17.2 Thermodynamics of Solution Formation 
 
Solubility rules: Like dissolves like 
 
Forming liquids Steps 
1.  Expand solute 
2.  Expand Solvent 
3.  Combine these two 
 
Enthalpy of solution: sum of energies used in expanding both solute and solvent.  
 
Vitamins are divided into 2 categories: fat soluble and water soluble.  
 
Pressure can increase the solubility of a gas.  
 
Henry’s Law is the relationship between gas pressure and the concentration of a dissolved gas.  
P = 𝑘
𝐻 𝑥  The law states that the amount of gas dissolved in a solution is directly proportional to the pressure of 
the gas above the solution 
 
Solid dissolving occurs more rapidly at higher temperatures and the amount of solid that dissolves 
increases/decreases w increasing temperature 
 
When temperature increases, gases become more soluble in nonaqueous solvents.  
 
Volatile solutions tend to go from solution to vapor phase rather quickly.  
 
Adding a nonvolatile solute to a solvent makes the solvent less likely to evaporate.  
 
𝑅𝑎𝑜𝑢𝑙𝑡 𝑠 𝐿𝑎𝑤 𝑋 𝑠𝑜𝑙𝑣𝑒𝑛𝑡 𝑃 𝑠𝑜𝑙𝑣𝑒𝑛𝑡    
X-solvent is the mole fraction of the solvent and P solvent is the vapor pressure of the solution. 
 
Any solution that obeys Raoult’s law is an ideal solution.  

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School: University of the Pacific
Department: Engineering
Course: CHEM027
Professor: Dimitry Izotov
Term: Fall 2017
Tags: liquids and solids
Name: Chapter 17 Notes
Description: These notes cover basic concepts and definitions
Uploaded: 03/25/2018
2 Pages 21 Views 16 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
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