1. HUSKY HELP….
You must wait for an interim.. If there is a smiley face and a check plus… you may leave at 5 minute bell… if not… YOU MUST STAY

2. Get a lab paper off the front table and read over it….
GET OUT YOUR HOMEWORK…
Get a lab paper off the front table and read over it….
HMWK: HMWK packet part 4 due MONDAY!!!
Work on Lab… typed up lab due on Tuesday…

3. Ionic vs Covalent Substance Lab

4. Substance 5- Copper Chloride
Scenario:
You are going to get 5 different substances and you need to be able to determine which ones contain covalent bonds and which ones contain ionic bonds.
Essential Question you will be investigating:
Which of the substances contains covalent bonds and which ones contain ionic bonds?
Hypothesis:
Write a PREDICTION that explains what substance will show which bond type each contains. You will need to have a separate hypothesis for each substance.
Substance 1 – Wax
Substance 2 – Starch
Substance 3 – Sugar
Substance 4 – Salt
Substance 5- Copper Chloride

5. Materials Substance 1 – Wax Substance 2 – Starch Substance 3 – Sugar
Substance 4 – Salt
Substance 5- Copper Chloride
400 mL beaker
Aluminum foil/ aluminum tray
Hot plate
Spoon
Light bulb with prongs
100 mL graduated cylinder
Room Temperature tap water
Goggles

6. Formula:
Use your research skills to determine the chemical formula for the substance. Record your answer in the observations table.
Appearance:
Use your observation skills to determine the appearance of the substance. Record your answer in the observations table.

7. Dissolving in Water / Conducts electricity in Water
Begin by gathering a spoon, a 100 mL graduated cylinder and a 400 mL beaker.
Place a small amount of substance #1 on the spoon and carefully place it in the beaker.
Fill the graduated cylinder up to 100 mL with tap water and then pour it into the beaker.
Begin stirring the solution in the beaker for 30 seconds and then let it sit for 30 seconds. Record if it dissolves or not.
Now, obtain a light bulb with prongs…. Carefully place the prongs in the water. Observe if the light is given off. Record your answers in column #5.
Repeat steps 1 – 5 with the remaining substances.

8. Melting Point
Begin by gathering some aluminum foil an aluminum tray and a hot plate. Fill the tray half full of water and place it on the hot plate.
Create a little foil boat to “ride” in your water bath. on your hot plate.
Place the substances in each corner and the center of the foil boat. (ex. Substance 1 in corner 1 (left top) , Substance 2 in corner 2 ( right top ) etc. You can label the foil if you want.
Place your boat with substances in the water bath. On the hot plate.
Turn the Hot Plate on to high. #2
Watch and record when each of the substances begins to melt.
Record the “Order of Melting” in your observations table.

9. There is an old saying….”Like dissolves like”
Soluble in Hexane?
There is an old saying….”Like dissolves like”
Use your research skills to determine what the “value” of column 5 is on your observations table.

10. Ionic and Covalent Properties Table
Ionic Compounds
Covalent Compounds
Property: Melting point
Test: Apply heat
High Melting Point
Result: Won’t melt at low heat
Low Melting Point
Result: Will melt at low heat
Property: Dissolve in water
Test: Put in water
Will dissolve in water
Result: Will “disappear” in water
Will not dissolve in water
Result: will NOT “disappear” in water
Property: Crystal formation
Test: ??
Will form crystals
Usually do not form crystals.
Property: Conduct electricity
Test: Will it illuminate a light bulb when dissolved in water?
Will conduct electricity IF melted or dissolved in water
Will never conduct electricity

11. Claims Evidence and Reasoning
Write a paragraph explaining your results. Use as many underlined vocabulary words as you can. Be sure to include the following in your paragraph:
What your claim was for each substance.
Which type of bond held the atoms of each substance together.
Evidence to support or refute your claim.
Use your observations. (Both numbers and senses)
Reasoning
Explanation of what you saw happen. (Explain data and use science to explain what you know about compounds, elements, and bonding)

12. Get Materials and Begin Working

13. Answers
Covalent
Wax
Sugar
Starch
Ionic
Salt
Copper Chloride