1. Activity 5: Physical and Chemical Properties
Chapter 5, pp 9 & 10

2. Chemical M.W. V.P. BP Fl.P. LEL PEL Sol. Sp.Gr. Kerosene MEK TCA
Ammonia
This is a copy of the chart found on page Point out to the class that the format will be changed on the following slides to make for easier reading. The information will be the same.

3. Chemical Kerosene M.W. V.P. BP Fl.P LEL PEL Sol. Sp.Gr. 184
170 (approx)
(100◦F) 5mmHg ◦F ◦F
0.7%
When debriefing the small groups, do not have a group give all the answers for a specific chemical. Have a group answer “M.W.”, then ask the other groups if they agree. Ask a different group for “V.P.” , and so on.
Proceed through each chemical using the same method.
If a group should give the wrong response, try and determine the reason. It could be that they were on the right page, but the wrong chemical.They could have misspelled the chemical as many of the spellings are similar.
Try and turn any mistakes into learning experiences rather than berating the group.
None
Insoluble
0.81

4. Chemical
MEK
M.W.
V.P. BP
Fl.P
LEL
PEL
Sol.
Sp.Gr. 36
72.1
78 mmHg
175◦F
16◦F
(200◦F) 1.4%
200ppm 590 mg/m3
28%
0.81

5. Chemical
TCA
M.W.
V.P. BP
Fl.P
LEL
PEL
Sol.
Sp.Gr.
314
163.4
(124◦F) 1 mmHg
388◦F NA NA
None
Miscible
1.62

6. Chemical
Ammonia
M.W.
V.P. BP
Fl.P
LEL
PEL
Sol.
Sp.Gr. 15
17.0
8.5 atm
-28◦F
NA (Gas)
15%
50 ppm mg/m3
34%
Does not have one

7. 1. Which chemicals pose a fire hazard?X
Kerosene
LEL 0.7% UEL 5% X
MEK
LEL 1.4% UEL 11.4%
TCA X
Ammonia
LEL 15% UEL 34%
This slide presents the answers in a different format than the manual, but the end result will be the same.
Three of the chemicals have an LEL and UEL, meaning they will burn
Why?

8. 2. Which chemicals would mix easily with water
2. Which chemicals would mix easily with water? Which would sink in water? Which would float in water?
Mix
Sink
Float
MEK – 28%
TCA – Miscible
Ammonia – 34%
TCA
Kerosene 0.81
MEK 0.81

9. Kerosene PEL = None LEL = 0.7% (700ppm) ????%
3. Remembering that 1% = 10,000 ppm, are the LELs more or less than the PELs?
Less
By about how much?
Kerosene PEL = None LEL = 0.7% (700ppm)
????%
MEK LEL = 200 ppm LEL = 1.4% (14000ppm)
1.4%
While Kerosene and TCA do not have PELs and therefore no comparison to the LELs can be made, these chemicals do have NIOSH RELs.
Also, TCA does not have an LEL, so again no comparison can be made for this chemical.
TCA PEL = None LEL = NA
?????%
Ammonia PEL = 25 ppm LEL = 15% (150,000 ppm)
.00016%

10. 4. What chemical would get into the air (evaporate)
fastest?
Chemical
Kerosene 5mmHg
MEK mmHg
TCA mmHg
Ammonia atm
slowest?

11. 4. What chemical vapor would be most likely to -------- near the site of a spill or leak?
Rise above?
Chemical
Kerosene
MEK
TCA
Ammonia
settle near?
With the exception of Ammonia, all are heavier
than air and may collect in low areas