ACT 1

Question 1

______ must be worn at all times in the laboratory to protect the eyes from chemical splashes

Answer 1

safety goggles or safety glasses with side panels

Question 2

Contact lenses are not permitted in the lab. The goggles can protect the eyes from splashes but not from _______ which can dry the contact lenses.

Answer 2

fumes

Question 3

The eyes are particularly susceptible to permanent damage by ________ and by ________. Never look into the open end of a test tube or a reaction vessel especially when it is being heated nor you should point its mouth toward anyone. Avoid rubbing your eyes unless you know that your hands are clean.

Answer 3

by corrosive chemicals and by flying fragments

Question 4

Sandals, open-toed shoes are not allowed to protect your feet from _________

High heels are not allowed for _____

Answer 4

broken glass, chemical splashes, and spills;

balance

Question 5

long hair is to be _______

Answer 5

constrained

Question 6

the apparatus to be used are often delicate or breakable and must be ________

Answer 6

treated with caution

Question 7

Chemicals must be handled carefully since

Answer 7

many are poisonous and dangerously explosive

Question 8

Never taste anything. Never directly smell the source of any vapor or gas; instead by means of _____________. Chemicals are not to be used to obtain a “____” or ______.

Answer 8

your cupped hand, bring a small sample to your nose.

“high” or clear your sinuses

Question 9

Perform in the ____ any reactions involving dangerous chemicals (irritating fumes, unpleasant odors).

Answer 9

hood

Question 10

_______ have fans to exhaust fumes out of the hood and away from the user.

Answer 10

Exhaust hoods

Question 11

The _____ should also be used when noxious, hazardous, and flammable materials are being heated.

Answer 11

hood

Question 12

Never pick up heated piece of glass. If you must, use _____, otherwise allow it to cool.

Answer 12

tongs

Question 13

Sitting is not allowed while performing the experiment. Stools/chairs pose hazards by _________.

Answer 13

by obstruction in pathways

Question 14

Do not sit on the laboratory tables. Pranks and horseplay, even when seemingly innocent, can cause __________ and are, therefore, strictly forbidden.

Answer 14

serious injury

Question 15

Do not place personal items like bags, knapsacks, books on the the laboratory desks because they ________ or ________.

Answer 15

take up valuable work space or may be damaged by fire or chemical spills.

Question 16

In case of fire due to gas leakage, ________________________. To prevent spreading of the fire, ____________.

Answer 16

immediately turn off the gas tank regulator;

cover it with sand or wet cloth

Question 17

Experiments other than that required in the procedure are allowed.

T OR F

Answer 17

F;

strictly not allowed

Question 18

Do not leave your experiment unattended.

Answer 18

Fire, explosion, or any other accident may occur this time.

Question 19

The most common laboratory accidents are ______________. Report breakage immediately to the stockroom.

Answer 19

cuts from broken glassware or thermometer

Question 20

Most chemical spills are best handled by _________ and then ___________

Answer 20

quickly absorbing wet material with paper towels and then washing the area with water.

Question 21

Neutralize a spilled acid or base as follows:

a.) acid on clothing
b.) base on clothing
c.) acid or base on the desk

Answer 21

a.) use dilute sodium bicarbonate solution
b.) use boric acid solution (50g/L)
c.) use solid sodium bicarbonate for either, followed by water.

Question 22

Report all injuries to the _____ for _____.

Answer 22

instructor for treatment

Question 23

Do not throw matches, litmus, or any insoluble solids into the sink. _______ are provided to collect hazardous solid or liquid wastes.

Answer 23

Labeled waste containers

Question 24

read the _____ twice before taking anything from the reagent bottle; there is a lot difference between the properties of 1 M H2SO4 and those concentrated (18 M) H2S04.

Answer 24

label

Question 25

Avoid taking excessive ___________.

______ is usually ample for test tube reactions

Answer 25

amount of reagent;

1-3 mL

Question 26

Never return unused chemicals to the ______. You may make a mistake that alter will cause other student’s suffer.

Answer 26

stock bottle

Question 27

Do not insert your own medicine dropper into the reagent bottles to _________. Pour only what you need into a small, clean beaker or test tube,

Answer 27

avoid contamination

Question 28

Do not lay down the stopper the of a reagent bottle. It may _____ and thus _______

Answer 28

pick up impurities and thus contaminate the solution

Question 29

Do no heat thick glassware such as graduated cylinders, volumetric flasks, or bottles because

Answer 29

they break easily, and heating distorts the glass so that the calibrations are no longer valid.

Question 30

All data should be recorded directly into your answer booklet, not on

Answer 30

loose sheets or scraps of paper.

Question 31

_________ is a prerequisite for safe and accurate experimentation. Keep your work table and the reagent table clean and tidy at all times.

Answer 31

Good housekeeping

Question 32

The recommended procedure for cleaning glassware is to wash the object carefully with a _________-, then _______ and _______. Then allow the glassware to drain overnight in your locker.

Answer 32

wash the object carefully with a brush in hot water and detergent, then rinse thoroughly with tap water, and finally rinse with a small amount of distilled water.

Question 33

If you must use a piece of glassware while it is still wet

Answer 33

rinse it with the solution to be used

Question 34

is the keystone to scientific work

Answer 34

integrity

Question 35

FIRST AID

1. Chemicals in the eye
2. Chemicals spilled on skin
3. Severe bleeding
4. Minor burns

Answer 35

1. hold the eye open and immediately flush with water. Continue for at least 15 mins.
2. Flush with large amount of water for 15 mins
3. Apply pressure or tourniquet
4. Apply burn ointment which can be obtained from the stockroom.