1­Introduction to Solutions 2017.notebook
Unit 10: Solutions
Textbook: Chapters 8.1­8.3
Chapter 15
Review book: Topic 7
• MAGIC SAND ACTIVITY
January 20, 2017
1­Introduction to Solutions 2017.notebook
January 20, 2017
Nature of the solute and solvent
'Like dissolves like"
• Substances with the same molecule polarity will dissolve together.
• To form a solution the solute must dissolve in the solvent.
Solution: A homogeneous mixture of substances in the same physical state
Solution Terms
• Solute: a substance that dissolves in a solvent.
• Solvent: a substance that dissolves a solute.
• Miscible/Soluble – when two substances will dissolve because of like polarities.
• Immiscible/Insoluble – when two substances will not dissolve because of opposite polarities.
1­Introduction to Solutions 2017.notebook
Aim: What is a solution? What will affect the solubility of a substance?
Solution: A homogeneous mixture of substances in the same physical state.
Examples:
Properties of a Solution 1.Homogeneous
2.Clear (transparent)
3.Can have color
4.Will not settle upon standing (solid does not come out of the liquid)
5.All parts will pass through a filter
January 20, 2017
1­Introduction to Solutions 2017.notebook
January 20, 2017
• Solubility – the ability of a solute to be dissolved in a solvent. (how well a substance dissolves)
Factors that affect solubility
• Nature of the substance
• Temperature
• Pressure (gases only)
Temperature • Temperature changes will affect the solubility of solid and gas solutes.
• As temperature increases, the solubility of a solid increases
• As temperature increases, solubility of a gas decreases
because the particles move faster (KE) and escape more easily.
1­Introduction to Solutions 2017.notebook
Pressure
• Pressure DOES NOT affect solids. It only affects GAS solubility.
• An increase in pressure increases the solubility of a gas January 20, 2017