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OBJECTIVES SWBAT – Identify the different types of homogeneous mixtures – Identify the factors that affect solubility
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CHEMISTRYSEPTEMBER 24, 2014
PROPERTIES OF MIXTURESSolubility
SCIENCE STARTER
• Work silently and individually on your Science Starter• You have 3 minutes
OBJECTIVES
• SWBAT–Identify the different types of
homogeneous mixtures–Identify the factors that affect
solubility
AGENDA
• Science Starter•Demonstration•Worksheet
DEMONSTRATION
Homogenous Mixture
• The 3 mixtures are examples of Homogenous Mixture. Homogeneous mixture being one that is uniform throughout. • Take 1 minutes to fill in the table
Transparent or Opaque
• Sugar Water – transparent• Milk – Opaque• Chalk in water - Opaque
Separate or not?
• Sugar Water – No• Milk – No• Chalk in water - Yes
Light Beams Through?
• Sugar Water - yes• Milk - yes• Chalk in water - no
TYPES OF HOMOGENEOUS MIXTURE
• Sugar Water – Solution• Milk – Colloid• Chalk in water - Suspension
Physical Properties of Mixtures
• Properties of Mixture can determine what separation method to use
Properties of Mixtures
•Density•Particle Size•Boiling Point•Freezing Point•Solubility
Solubility
• The amount of substance that will dissolve in a given amount of solvent• This is a quantitative term
Solubility
• Solution = solute in solvent• Solute = the substance
being dissolved• Solvent = the substance
doing the dissolving
You Try It
• Given Sugar Water–Identify the solute–Identify the solvent–Identify the solution
Example
• Sugar Water–Solvent = water–Solute = sugar–Solution = Sugar Water
Degree of Solubility
• How much solute will dissolve in a certain amount of liquid at a given temperature
• Unsaturated – solution below the limit• Saturate – solution is at its limit• Supersaturate – solution that exceeds it
saturation limit
SUPERSATURATED
• A Solution can exceed its saturation limit by increasing the temperature • However, the solution is not stable
and the extra solute will normally crystallized when the solution cools.
SOLUBILITY CURVE
• Graph used to identify the saturation limit–On the Line – saturated–Under the line – unsaturated–Above the line - supersaturated
You try it
• Given the Solubility Curve for water, identify when the solution is undsaturated, saturated or supersaturated.
Solubility Curve
• The Solubility Curve may vary for different solute