1. QQ:
How many atoms are represented here? 2 Al2(CO3)3
Use Lewis Dot Structures to represent:
Aluminum Sulfide
Carbon Tetrahydride

2. QQ:
How many atoms are represented here? 2 Al2(CO3)3 Al
CO3 Al
CO3
Total: 14 atoms X2 28

3. QQ:
Use Lewis Dot Structures to represent:
Aluminum Sulfide

4. Use Lewis Dot Structures to represent:
b) Carbon Tetrahydride
Aka: Methane

5. Today’s Objective:
I can use proper procedures in a science laboratory.

6. Monday

7. Where am I now?

8. Tuesday
Nov 29
3 – 4:30

12. Clean up:
Do you believe this beaker was washed?
Me neither. Be sure to wash and dry glassware to get all particles out…even ones you can’t see!

13. Moving Milk

14. 1) Pour enough milk to cover the bottom of a small plate.
Put two drops of each color of food coloring in the very center of the milk. Place them right in the same place on top of each other.

15. Dip a cotton swab right in the. dish soap. Let it absorb quite a. bit
Dip a cotton swab right in the dish soap. Let it absorb quite a bit. Then put the end of the swab right down in the center of the darkened part of the milk. Observe and record what happens.
Hold the cotton swab right down to the plate and hold it there. Observe what happens now.

16. 5). Use the other end of the cotton. swab and dip it in the dish soap
5) Use the other end of the cotton swab and dip it in the dish soap. Now place this on the side of the plate. Observe and describe what happens.
6) What do you think caused the colors to move?

17. Moving Milk Molecules
Moooving Milk Lab

18. "Like Dissolves Like“ Polar solutes will dissolve in polar solvents
Nonpolar solutes will dissolve in nonpolar solvents

19. Finish Chromatography Lab
Water
Alcohol
Ammonium
Acetic Acid (vinegar)

20. QQ: Use Friday’s Document Authentication Lab data to
answer these questions.
Explain why capillary action is important in creating the chromatogram.
Which liquid moved the ink the fastest? What does that suggest about the size of its molecules?
Think about the inks in water. Which of your ink samples were polar? How do you know?