Solutions Lesson 11

What is a Solution Solution: well-mixed mixture that contains a solvent and at least one solute Contains the same properties throughout Contains particles (molecules or ions) that are too small to ne seen

Fill in the blank A solution is a mixture of a ________________ and solute It contains the same _________________ throughout

What is a Solution Also know as a homogeneous mixture (uniform composition  same throughout) Made up of two or more substances Cannot be easily distinguished from each other There are two main parts of a solution Solute Solvent

Fill in the blank There are two main parts to a solution, ________________ and ____________ A solution is a h________________ mixture Homogeneous means _____________ throughout

What is a solution? Examples of Solutions: Saltwater, rubbing alcohol, air, brass (zinc and copper) Two parts of a solution Solute: makes up the minority of the solution, or this is the part that is dissolved Ex Salt in saltwater Solvent: makes up the majority of the solution. Part where the solute is dissolved. Ex Water in salt water

Colloids A mixture containing small, undissolved particles that do not settle out Solutions and colloids differ in the size of their particles and how they affect the path of light Colloids contains larger particles than a solution Ex. Fog (water droplets in air), milk, shaving cream, mayonnaise https://www.youtube.com/watch?v=sGTjd9WBVeQ Still too small to be seen easily but large enough to scatter light beam

Suspension Suspension: mixture in which particles can be seen and easily separated by settling or filtrations Unlike a solution, a suspension does not have the same properties throughout Contains visible particles that are larger than the particles in solutions or colloids https://www.youtube.com/watch?v=b3HS_woWaJ Q

Fill in the Blank Suspension are mixtures in which particles can be _________ and easily ____________ by settling or filtrations A suspension does not have the same _______________ throughout Contains visible particles that are ____________ than the particles in solutions or colloids

Particles in a Solution Why do solutes disappear when you mix them with a solvent? When a solution forms, particles of the solute leave each other and become surrounded by particles of the solvent

Effects of Solutes on Solvents Freezing point of pure water is 0 degrees Celsius Boiling point of pure water is 100 degrees Celsius Adding solutes lower freezing points and raise boiling point of solvent Freezing saltwater bay vs freshwater lake Boiling point increases because the adding particles of the solute make it harder for water molecules to escape  more energy is needed