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Safety rules Flashcards

(73 cards)

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1
Q

According to the safety instructions, if you fail to follow any safety rule :

A

you may be dismissed from the lab

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2
Q

you are excused from wearing goggles in lab :

A

never

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3
Q

the drench hose

A

can be used on chemical spills on a small area of the body or as an eye wash

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4
Q

the phone located in the lab :

A

is to be used for calling 911 in case of emergency

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5
Q

for large chemical spills on the countertop or floor:

A

use the spill kit located in a labeled cabinet in the lab

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6
Q

in the hallway across from the lab entrance, there is :

A

an intercom with a button and a picture of an emergency phone on it, this is a direct line to the Cerritos College campus safety

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7
Q

you should prepare for the lab by ?

A

reading the assigned experiment before coming to the lab to avoid accidents due to a lack of comprehension of the procedure, techniques, or equipment involved in the experiment

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8
Q

if you do not understand the experimental procedure :

A

ask the instructor

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9
Q

in the lab each student should :

A

be on alert, watching for his own safety and the safety of others

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10
Q

if you are pregnant or have a medical condition

A

check with your physician prior to working in the lab

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11
Q

before evacuating the lab in case of the earthquake or other emergency, you will :

A

turn off gas valves and electrical equipment (and containers must be closed)

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12
Q

you are permitted to enter the lab if :

A

the instructor is present

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13
Q

you may do an unassigned experiment, only :

A

never, only the authorized scheduled experiment can be performed in the lab

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14
Q

you can only change the procedure of the experiment if :

A

never, you are not allowed to alter the procedure of the lab experiment carefully follow all instructions

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15
Q

in lab you are allowed to eat and drink only :

A

never, eating, drinking, and chewing gum are not allowed in the lab. no food or drink is allowed in the lab to avoid possible contamination. chewing gum may absorb chemicals from the laboratory

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16
Q

store your books and bags

A

under your bench (keep area around your chair clean, do not store belongings on top of the lab bench, large bookbags under bench, smaller purses can be stored in a drawer, each lab bench has pullout writing spaces for notebooks)

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17
Q

if you notice unexpected chemical reaction of your experiment

A

notify the instructor

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18
Q

in lab, to avoid bumping into other students, you should

A

look behind you before you back up

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19
Q

damaged or exposed electric cord :

A

should always be reported to the instructor

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20
Q

to avoid electric shock when handling electric plugs and equipment

A

you hands must be dry, grasp the electrical plug (not the cord) when removing it from socket

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21
Q

the following should be reported to the instructor

A

all accidents no matter how minor

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22
Q

if you feel ill in lab

A

tell the instructor

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23
Q

for your safety, before leaving the lab, you must

A

make sure your desktop and work area is clean use a wet paper towel for cleaning, floor area fume hoods, and sink area are clean ; pick up all solids from the floor and the sink even if they are not yours, all equipment in community drawer is complete and well organized, wash your hands and any other area of skin that has contacted lab equipment or lab benches such as your arms, just before leaving the lab

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24
Q

if you accidently mix the wrong chemicals, you must

A

report it to the instructor immediately

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25
if you come to the lab dressed inappropriately, you will be asked to
leave the lab
26
goggles should be worn
all the time during the lab
27
you must wear goggles in the lab because
they protect your eyes from fumes, odors, and chemical splashes
28
proper apparel for the lab includes
clothes that cover your torso and your legs to at least the knees
29
proper footwear in lab is
closed toe shoes
30
for safety, long hair needs to
be tied back
31
if you are instructed to smell a chemical in the lab, you need to
fan the air above the chemical toward your nose
32
if you need to touch or rub your eyes, you must
wash your hands
33
you should always hold containers that have chemicals
away from your body
34
before using the contents of a bottle, check
the label on the bottle, make sure it is the correct chemical and correct concentration
35
to remove solid chemicals from a bottle
pour the solid directly into your container by tilting the bottle and rotating it to control the amount dispensed
36
what if the solid seems to be tightly packed
close the container and then gently tap the bottle with the palm of your hand to loosen up the caked solid
37
to remove liquid from a reagent bottle
pour liquid into your container, and then use your medicine dropper to take as much as you need from your container
38
an unused/leftover chemical should be
disposed of in the designated waste container
39
to dispense a required amount of reagent
take your container to the reagent bench
40
pick up a reagent bottle by holding it
with your palm over the label, wipe any drips off of the other side of the bottle before putting it back. be sure the bottle is dry before replacing it on the lab bench or shelf
41
to dilute a concentrated acid
always add the acid slowly to the water while stirring to avoid splattering and releasing the heat all at once
42
store chemicals in
labeled containers
43
apply labels and markings on the etched part found on beakers and flasks by using
pencil only
44
the fume hood is used for
toxic fumes
45
when working with an experiment under a fume hood
keep fume hood sash down as far as possible
46
flammable liquids
keep away from from heat sources and open flames in the fume hood, if a flammable liquid is used in the laboratory do not use open flame at all
47
alcohol used in the lab
is chemically denatured, it has been tainted with poison to make it unsuitable for drinking
48
wash bottles should be filled 'only' with
distilled or de-ionized water, use distilled or deionized water only when instructed to add water in a experiment or a final rinsing of glassware
49
to add water to a reagent used in an experiment
use distilled or deionized water
50
to weigh 2 grams of salt in lab
place solids into a beaker or weighing paper before weighing on a balance
51
if you spill solid chemicals on a balance
brush off any spills
52
after dispensing a chemical from a container
replace the stopper or lid immediately
53
if no specific instructions for disposing of waste chemicals are given, you should dispose of all liquids and solutions into
a. dispose of liquids and solutions by pouring them down the sink one at a time accompanied by running water to avoid unexpected reactions: never mix chemicals in the sink b. solid chemicals, insoluble material, and filter paper are to be disposed of into the trash bin
54
you should get under the shower in lab
if there is a large chemical spill on the body, wash affected area for at least 15 minutes and remove all contaminated clothing
55
if the eyewash or shower is used in lab, the affected area should be irrigated and rinsed with water for at least
15 minutes
56
if you spill a large amount of chemical on the floor
alert nearby students and call the instructor for instructions about how to clean it up
57
mercury spills
should be reported immediately to your instructor, mercury gives off toxic vapor and students are not allowed to clean up mercury spills the instructor may evacuate the lab until cleaning ventilation is complete
58
a cracked test tube or chipped glassware should
never be used, get a replacement from the stockroom
59
when inserting glass tubing into a rubber stopper, hold the glass tubing
close to the end near the stopper, always lubricate the glass tube before inserting it in a rubber stopper and protect your hands with a towel when inserting glass tubing, insert carefully with a gentle twisting motion, do NOT force it
60
if a ground glass stopper is frozen (stuck) to a bottle
report it to your instructor for replacement (if you force the stopper off the bottle, you may experience a chemical splash, burn, and bodily injury
61
when you use a thermometer
lay it on a towel, do not shake thermometer, and keep away from the edge of the lab bench
62
to remove stopper or lid from a bottle, pick up the stopper then
turn it upside down before placing it on the countertop (this will help avoid contaminating the chemical when the stopper is replaced)
63
since you cannot tell from the appearance of a metal or glass that it is still hot, you should test it by
cautiously bringing the back of your hand close to the hot glass or metal to feel if heat is radiating from it
64
to handle hot objects like a beaker or evaporating dish
use the proper pair of tongs
65
a hot object, like an evaporating dish or crucible, is allowed to cool by placing it on
on wire gauze to cool (they will crack and shatter if placed hot on the lab bench or come in contact with water)
66
when heating liquid in test tube, the open end of the test tube
should point away from yourself and your neighbors, move the test tube back and forth through the flame at an angle do not heat above the liquid level a test tube may shatter if the liquid splashes over that hot glass
67
to light a bunsen burner
you need to step back
68
you may leave a lighted bunsen burner unattended only, if
never
69
in case of accident or injury to you or to your classmate
must be reported immediately to the instructor
70
small burns from touching hot objects, should be
placed under running cold water for at least 20 minutes
71
if your clothing catches fire
drop to the floor and roll on the floor to smother the flame
72
a small contained fire may be
smothered by covering it with a cover plate or watch glass
73
in case of an earthquake
turn off the gas valve and stay away from falling objects

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