CHM2045L Final Exam UF

Flammable materials, like alcohol, should never be dispensed or used near

an open flame

If a laboratory fire erupts, immediately

notify your instructor

Approved eye protection devices (such as goggles) are worn in the laboratory

at all times

If you wear contact lenses in the school laboratory

take them out before starting the lab and wear glasses under lab goggles

If you do not understand a direction or part of a lab procedure, you should

ask the TA before proceeding

After completing an experiment, all chemical wastes should be

disposed of according to your TA's directions

If a lab experiment is not completed, you should

discuss the issue with your instructor/TA

You are heating a substance in a test tube. Always point the open end of the tube

away from all people

You are heating a piece of glass and now want to pick it up. You should

use tongs

You have been injured in the laboratory (cut, burn,etc.). First you should

notify your TA/instructor immediately

When gathering glassware and equipment for an experiment, you should

all of the above

(examine all glassware for chips or cracks;

clean any glassware that appears dirty;

read all directions carefully to know what equipment is necessary)

Personal eyeglasses provide as much protection as

none of the above (face shield; safety glasses; splashproof chemical goggles)

Long hair in the laboratory must be

tied back or kept securely out of the way with a hair band, hairpins, or other device

In a laboratory, the following should not be worn

all of the above

(sandals; dangling jewelry; leggings)

The following footwear is best in the laboratory.

closed-toed shoes

Horseplay or practical jokes in the laboratory are

always against the rules

If a piece of equipment is not working properly, stop, turn it off, and tell

your TA/lab staff

If an acid is splashed on your skin, wash at once with

plenty of water

When you finish working with chemicals, biological specimens, and other lab substances, always

wash your hands thoroughly with soap and water

When working in a lab it is important to orient yourself and identify locations of a fire blanket, fire extinguisher, the exits, eyewash stations, emergency showers, fire alarms, and waste containers

True

Carcinogen

Mutagenicity

Reproductive Toxicity

Flammables

Skin and Eye Irritant

Gas Under Pressure

Corrosion

Eye Damage

Explosives

Self-Reactives

Oxidizers

Acute toxicity (fatal or toxic)

How long should you rinse your eyes in the eyewash station?

15 minutes

Accuracy vs Precision

Accuracy: how close experimental value is to accepted valuePrecision: how closely measured values agree with each other

Percent Error Formula

|measured value - accepted| / accepted value x100