Unit 8: Solution Chemistry

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Presentation transcript:

Unit 8: Solution Chemistry Lesson 1: Solutions and Conductivity

Important Definitions A solution is a homogeneous mixture made up of a solvent and a solute. The solvent exists in the greater quantity, while the solute exists in the lesser quantity. A solvent is saturated with a particular solute if the solvent has dissolved as much of the solute as possible. The solubility of a solute is the maximum amount of it that can dissolve in a given amount of solvent at a given temperature. 10 min

Pick-a-Side: Solution or Not? Oatmeal Root beer Copper Brass Water 5 min

Brain Break!

The Conductivity of Aqueous Solutions Predict: What will happen when potassium permanganate (KMnO4) is added to the water? Observe: Record your observations from the demonstration. Explain: The greater the concentration of ions in a solution, the greater the electrical conductivity of a solution. As the potassium permanganate dissolves, it forms ions! Demo 11.IX.5 – 15 min – test battery in advance!

General Rules of Conductivity* Metals always conduct. Solids other than metals don’t conduct. Acids and bases in solution/liquid conduct. Ionic solutions/liquids conduct. All other substances don’t conduct. *There are exceptions, but these provide useful guidelines. 5 min

Practice Time! Pg. 198 #6-8 15 min