2. CHM 111 lab-what to expect?

3. Agenda
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1 –Money burning demo-Chemical
2 –Decomposition-Chemical
3- Boiling –physical
4-Check in !!!!
5-Power point on Safety

4. In the past-1980’s
• Large text books
• Needed to memorize “Reactions of functional
groups and mechanism”

5. Chemials you are dealing with
• Are ofcourse-are Acids –Bases or Organic!
• They have high vapour pressures
• They are Flammable

6. Safety in a car

7. Safety in the lab

8. lab coats
• Can be taken off if something spills on You

9. Accidents could be from some else

10. Just like a drunken driver
• You are not always the cause-some other lab

11. Most organic molecules are tearing
agents-leave lab when feeling dizzy!

12. Also –No contact lens!!

13. No flip flops –when warmer!!
• Proper footwear is imperative-sneakers OK!

14. The labs are cold-be prepared

15. Water flow simulates air flow

16. When Some has an accident . .
• Hold out a stick . . . .

17. Get the instructor . .know location
of showers

18. Need to work in pairs
• You can not see Yourself!

19. Lastly –respect for others

20. Assignments will look like this
Week 2 : 2/6/2012
Prelab Questions: Due 2/6/2012 at the start of the class:
• Please watch required video-download sample lab•
Define what is a crystal?
• Write an expanded outline for the seven-step process
of crystallization.
• *This will be included in the lab report

21. .

22. .
• This technique is used for obtaining a
compound in pure solid form of well-defined
geometrically shaped crystals. This process of
crystallization can be used for the purification
of a compound only when the compound and
the impurities present in it differ considerably
in their solubilities in any particular solvent

23. Digimelt apparatus
Chapter 4: Melting point- Please watch required
video in portal
• 3.) (3 sentences) Why are melting points
recorded?
• Review operation of “Digimelt apparatus”
*This will be included in the lab report