Question

for the following statements of safety, follow the rule if the statement is true or a f if it misstates the safety procedures that correspond to the rule.
a. testing a substance is a good way to identify it.
ab. the lab group working across from you (coworkers) should be aware of what you are doing, especially if it is dangerous.
c. it is all right for your lab partner to take off their goggles and apron if you are doing all the work, because they wont miss their right eye should a test tube you are heating blow up in their face.
d. if you break glassware, quickly pick up the large pieces with your hands to avoid other people receiving an injury.
e. you can take your safety goggles off when cleaning up in the lab.
f. always look into the open end of a test - tube when heating to see the reaction that is taking place.
g. always read a chemical label twice.
h. always use the safety apron and tie it down when using it so that it will protect you from splashes, harmful fumes, and the like.
i. heating several cans is a safe laboratory practice.
j. there are certain pieces of equipment in the classroom that you are responsible to know how to use.
k. make sure you are with someone when working in the lab.
l. be sure to rinse a chemical down the sink with plenty of water before you dump another chemical down the sink.
m. always go to lunch with chemicals on your hands. it will add flavor to your food and encourage the growth of cancer cells.
n. sandals are a good idea in lab because a falling test tube full of acid can create an acid - rain effect on your skin which is an interesting fashion statement.
o. any experiment that gives off dangerous gases should be done under the fume hood.
p. put books, bags, etc. under your desk so that you can quickly exit the room if you need to.
q. the teacher always appreciates creativity in the lab, especially when you mix extremely dangerous chemicals that could cause explosions or dangerous gases to be released, endangering everyone in the room.
r. you break it because of horseplay, you buy it.
s. electrical outlets are good, safe pencil holders.
t. always tell the teacher about an injury, no matter how minor.
u. if you stick your gum to the side of your lab drawer while working in lab, it will still be fresh to chew when you are finished.
v. adding more of a chemical than an experiment calls for may create an extreme excess of energy or too much of a dangerous gas and this endangers everyone in the room.
w. pay attention to where you set down a chemical container.
x. always leave the caps off containers so that contamination is likely to occur. everyones lab will be messed up and they will appreciate coming in after school to redo it.
y. boiling test tubes should be removed from the heat immediately to prevent the liquid from shooting out.
z. if the fire alarm sounds, dont worry about what is on your lab table, just leave as quickly as possible. if the building is already on fire it wont matter that you create another fire at your lab station by leaving your burner unattended. (this is two rules)
aa. carry sharp objects pointed downward below your waist.
ab. the procedure for using a pipette is just like using a straw.
ac. if acid spills on your skin, simply rinsing it quickly and wiping your skin dry should prevent injury.
ad. genetic mutations can result from the exposure of an unborn child to certain chemicals, so it is important for pregnant women to avoid exposure to these substances.
ae. it is cool to steal chemicals from the classroom. your friends will really be impressed when chemicals eat a hole through your leg because the stolen chemical spilled on your skin.

Explanation:

Each statement is evaluated against standard lab safety protocols to determine if it is safe (5) or unsafe (U).

Answer:

A. U
B. 5
C. U
D. U
E. U
F. U
G. U
H. 5
I. 5
J. 5
K. U
L. U
M. U
N. 5
O. 5
P. U
Q. U
R. U
S. U
T. 5
U. U
V. U
W. 5
X. U
Y. 5
Z. U
AA. 5
AB. U
AC. U
AD. 5
AE. U