1. Solutions Lesson 11

2. 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

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

4. 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

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

6. 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

7. 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
Still too small to be seen easily but large enough to scatter light beam

8. 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 Q

9. 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

10. 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

11. 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