1. WATER And Solution Formation
Ch. 15
WATER
And
Solution Formation

2. Water is unique Polar Covalent (Molecular) Compound
Inter Molecular Forces (Hydrogen “bonds”) VERY STRONG (but not stronger than ionic/covalent)
Strong Bonds cause :
High boiling point
Low vapor pressure
High surface tension

3. What is vapor pressure???
Defined as the pressure that a substance’s vapors exert when in the solid/liquid state.
LOW Vapor Pressure, example: H2O
HIGH Vapor Pressure, example: CO2

4. Solid Water (ICE) Unique structure due to H-bond
Ice floats bc of structure
Less dense than liquid
Open hexagon structure
or honeycombed shape

5. Solutions Solvent: Dissolving medium (does the dissolving)
Solute: the dissolved particles (gets dissolved)
Solvation: the dissolving process
Water is called the UNIVERSAL SOLVENT

6. Crash Course https://www.youtube.com/watch?v=9h2f1Bjr0p4
Write 3 things about solutions in your notebook

7. MOLARITY (Concentration)
Molarity = mol / volume (Liters)
Ex: What is the molarity of a solution in which 5 mols of NaCl are dissolved in 3.0 L of water?
5 mol/3 L = 1.67 M
Ex: What is the molarity of a solution in which 10 mols of CO2 are dissolved in 4 L of water?
10 mols / 4 L = 2.5 M