Warm Up 11/1/17 1. What is an acid? 2. What is a base?

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Presentation transcript:

Warm Up 11/1/17 1. What is an acid? 2. What is a base? 3.How many times more acidic is a substance with a pH of 2, than one with a pH of 5?

Warm Up 11/1/17 1. What is an acid? More H+ released in a solution 2. What is a base? More OH- released in a solution 3.How many times more acidic is a substance with a pH of 2, than one with a pH of 5? 10 X 10 X 10 = 1,000 times more acidic

Solubility NOTES B4 WATER UNIT

Solution = Solute + Solvent 1

Solvation/Dissociation Process of surrounding solute particles with solvent particles to form a solution Video 1

Like Dissolves Like Polar substances dissolve polar substances and ionic substances Nonpolar substances dissolve nonpolar substances Water is a universal (versatile) solvent because it is polar. EX: Demo Styrofoam (nonpolar) + water (polar) = insoluble Styrofoam (nonpolar) + acetone (nonpolar) = soluble 1

Factors Affecting the Rate of Solvation To increase solvation of a solid Heat it (↑ temp.) Stir it (agitate the mixture) Crush it (↑ surface area) To increase solvation of a gas Cool it Increase pressure 1

Temperature and Pressure Change: Solid vs. Gas

Pressure Change: Solid vs. Gas

Solids dissolve best when Gases dissolve the best when Summary Solids dissolve best when Gases dissolve the best when Heated Solution is cold Stirred Pressure is high Crushed  

Solubility The amount of solute that will dissolve in a given amount of solvent at a specific temperature and pressure (for gases), (g of solute/100g of solvent). 1

Types of Solutions Unsaturated – a solution that can dissolve more solute Saturated – a solution that contains the maximum amount of solute that can dissolve Supersaturated – a solution that cannot dissolve more solute 1

Practice 80 grams 47 grams 160 grams How many grams of NaNO3 will dissolve in 100g of H20 at 10⁰C How many grams of KCl will dissolve in 100g H20 at 70 ⁰ C How many grams of NaNO3 will dissolve in 200g H2O at 10 ⁰ C 80 grams 47 grams 160 grams 1