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Unit 2, Day 7
Bellringer
Journal Entries – Unit 2, Day 7
Date Entry Page Number
Melting Point, Boiling Point, and Solubility Notes
RIGHT SIDE
Unit 2 - Day 7 Physical Properties Mini Lab
LEFT SIDE
Benchmark: SC.8.P.8.4 Objectives:
• Today you will be able to:–Classify and compare substances
on the basis of their solubility, melting and boiling points.
–Explain that these properties are independent of the amount of the sample.
Important Vocabulary
-Physical Property
-Solubility
-Melting Point
-Boiling Point
-Solute
-Solvent-Saturated -Unsaturated -Supersaturated
Physical Property1. A property that can be observed or
measured; a characteristic.
Mass
Odor
Volume
Density
Physical Property
Magnetism
ClassifyTo arrange into groups
Yellow Orange Soft Hard
2. Physical Properties help scientists classify matter
Physical Properties of Matter
•Melting Point
•Boiling Point
•Solubility
Melting Point3. The temperature at which a
substance changes
from a solid to a liquid. The melting
point varies
depending on the
substance
Physical Properties of Matter
•Melting Point
•Boiling Point
•Solubility
Boiling Point4. The temperature at which
a substance changes
from a liquid to a gas.
100o C Boiling Point of Water
The boiling point varies
depending on the
substance
Melting / Boiling Point Activity
http://www.harcourtschool.com/activity/hotplate/
How could an objects melting point and boiling point help a scientist figure out what substance they
have?
Physical Properties of Matter
•Melting Point
•Boiling Point
•Solubility
What is solubility?
5. Solubility = how easily a solute dissolves in the solvent to form a solution or a homogeneous mixture.
Solubility is a physical property of matter
What is a saturated solution?
Saturation6. Saturated: when
a solution contains the maximum solute it can hold.
Cannot fit any more (any extra solute added would sink to the bottom)
Rate of Melting, Boiling, and Solubility Mini-Lab
• 1. Send up one lab representative to receive materials.
• 2. Put your name and date on the top of your paper.
• 3. Remember to follow step by step instructions for class points!
Exit Slip• 1. What is the difference between a solute and a
solvent.
• 2. When a solution has as much solute as it can hold we call this ________________.
• 3. When a solution has less solute than it can hold we call this _________________.
• 4. Does the size of the sample affect its melting point or boiling point?
• 5. Why are melting point, boiling point, and solubility physical properties?
FCAT Challenge Question
SC.8.P.8.4 – Boiling Point
1. Stephanie is given an unknown liquid to test in the laboratory. She thinks this liquid might be alcohol. Which physical property would be the most helpful for Stephanie to determine the identity of the liquid?
A. Its color
B. Its mass
C. Its boiling point
D. Its volume
FCAT Challenge Question
SC.8.P.8.4 – Boiling Point
1. Stephanie is given an unknown liquid to test in the laboratory. She thinks this liquid might be alcohol. Which physical property would be the most helpful for Stephanie to determine the identity of the liquid?
A. Its color
B. Its mass
C. Its boiling point
D. Its volume