Unit 12: Solutions NO2 ⇄ N2O4.

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Presentation transcript:

Unit 12: Solutions NO2 ⇄ N2O4

A. Solution Formation Solution - homogeneous mixture Solute - substance being dissolved Solvent – dissolving medium (dissolver) (present in greatest amount)

A. Solution Formation Types of Solutions: Solute Solvent Example Gas Air (O2 & CO2 in Nitrogen) Liquid Water in Air Soda Vinegar (acetic acid in water) Solid Salt in water Stainless Steel (Cr & Ni in Iron)

Why does stuff dissolve? IMAFs between solute–solute solvent–solvent must break Greater solubility: IMAFs between solute–solvent must form stronger IMAFs solute–solvent

A. Solution Formation Electrolyte: forms ions to conduct in solution - + salt NaCl - + sugar C12H22O11 Strong Electrolyte Non-Electrolyte ALL ions from ionic compounds ALL molecules from molecular compounds

Solubility in 100 g of Water at 20oC B. Solubility Solubility maximum mass of solute that will dissolve in a given amount of solvent at a given temperature Solubility in 100 g of Water at 20oC Compound Solubility (g) Table Salt (NaCl) 36.0 g Baking Soda (NaHCO3) 9.6 g Table Sugar (C12H22O11) 203.9 g (0.62 mol) (0.11 mol) (0.59 mol)

less solute than max dissolved more than max solute dissolved B. Solubility UNSATURATED less solute than max dissolved SATURATED max solute dissolved SUPERSATURATED more than max solute dissolved concentration

less solute than max dissolved more than max solute dissolved B. Solubility UNSATURATED less solute than max dissolved SATURATED max solute dissolved SUPERSATURATED more than max solute dissolved concentration

less solute than max dissolved more than max solute dissolved B. Solubility UNSATURATED less solute than max dissolved SATURATED max solute dissolved SUPERSATURATED more than max solute dissolved concentration

less solute than max dissolved more than max solute dissolved B. Solubility UNSATURATED less solute than max dissolved SATURATED max solute dissolved SUPERSATURATED more than max solute dissolved concentration

WS Solutions & Solubility Quick Quiz! 1) Compounds that partially dissociate (or ionize) into solutions of ions and molecules that partially conduct are … A) non-electrolytes B) weak electrolytes C) strong electrolytes D) gatorade WS Solutions & Solubility #1-9