Solvent Solvent - Solute - Solution Part of the solution that is present in largest amount and dissolves a solute What liquid is called the “universal solvent”? WATER

Part of solution present in lesser amount and dissolved by solvent Solute Part of solution present in lesser amount and dissolved by solvent

Solution A well mixed mixture containing a solvent and at least one solute that has the same properties throughout. Tasty solution activity

Mixture Page 30 Made of two or more substances- elements, compounds or both- that are together in the same place but are not chemically combined.

Heterogeneous Mixture Page 30 Heterogeneous Mixture You can see the different parts

Page 30 Homogeneous Mixture So evenly mixed that you can’t see the different parts

Heat- transfer of energy

Exothermic- heat energy EXITS the system - ex. Combustion, burning                           http://www.graspr.com/videos/potassium-permanganate-and-glycerine-2

2Na(s) + Cl2(g)  2NaCl(s) + energy Salt An example of an exothermic reaction is the mixture of sodium metal and chlorine gas which yields table salt. 2Na(s) + Cl2(g)  2NaCl(s) + energy http://www.schooltube.com/video/2fa9cb3e39064832b31d/Reaction-of-Sodium-and-Chlorine

Endothermic- heat energy ENTERS the system Page 31 Endothermic- heat energy ENTERS the system - surroundings usually feel cooler ex. Cold packs, melting ice