WATER And Solution Formation

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Presentation transcript:

WATER And Solution Formation Ch. 15 WATER And Solution Formation

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

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

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

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

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

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