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