Gen chem 1 lab final

What does the skull and crossbones represent when used as the pictogram on an SDS? -carcinogen -flammable -acute toxicity -corrosive -explosive

acute toxicity

In a laboratory, the following should not be worn -sandals. -leggings. -dangling jewelry. -all of the above.

all of the above

Although eating and drinking are not permitted in the laboratory, chewing gum and candy are allowed. (T/F)

false

When should you clean up a chemical that you spill in the lab (such as at the balance station)? -whenever the TA catches you -immediately -at the end of the lab period

immediately

What does the exclamation mark represent when used as the pictogram on an SDS? -carcinogen -mutagen -flammable -irritant -oxidizer

irritant

What happens when silver nitrate is heated to composition? -nothing -may emit toxic fumes -releases water -forms carbon dioxide

may emit toxic fumes

When is it OK to work with chipped or broken glassware in the laboratory? -if it is a small chip or crack -if the crack is just a star-crack -if the crack seems to be only partway through the glass -never

never

Which of the following personal items are permitted to be at your workstation in the laboratory? Select all that apply. -pen or pencil -drinking water bottle lab manual (printout)

pen or pencil lab manual (lab printout)

If you wear contact lenses in the school laboratory -you do not have to wear protective goggles -take them out before starting the lab and wear glasses under the lab goggles -keep the information to yourself -advise your instructor that you wear contact lenses

take them out before starting the lab and wear glasses under the lab 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. -cut short. -held away from the experiment with one hand. -always neatly groomed.

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

What effect (if any) does silver nitrate have on aquatic species? -none -toxic -unknown -is beneficial

toxic

All chemicals in the lab are to be considered dangerous. (T/F)

true

Both acids and bases can be corrosive. (T/F)

true

Electricity can be hazardous. (T/F)

true

Flammable liquids should be used with care near sources of ignition. (T/F)

true

What is the CAS registery number for sodium hypochlorite? Enter the number including dashes, for example xxx-xx-x or xx-xxx-xx, depending on how many digits are in each of the three sections.

7681-52-9

What is the melting point of 1-naphthol, according to the SDS? -542 C -1.224 C -233 C -96 C -1870 C

96 C

Flame temperature can be adjusted by: (select all that apply) -adjusting the gas flow by turning the handle on the natural gas valve -adjusting the metal collar on the burner -lighting the burner with a match

-adjusting the gas flow by turning the handle on the natural gas valve -adjusting the metal collar on the burner

Which pictogram(s) appear on the SDS for silver nitrate? Select all that apply. -carcinogen -flammable -irritant -skin corrosion/burns -explosive -oxidizer

-irritant -skin corrosive/burns -oxidizer

What do the pictograms for 1-naphthol indicate? Select all that apply. -skin corrosion/burns- -oxidizer -irritant -acute toxicity (fatal) -flammable

-skin corrosion/burns -irritant

The SDS for 1-octanol is provided here. Is 1-octanol a flammable liquid according to NFPA? -1-octanol is flammable -1-octanol is combustible

1-octanol is flammable

In case of a chemical splash to the eyes, how long should you rinse your eyes in an eyewash station? -5 minutes -60 minutes -15 minutes

15 minutes

It is important that you are properly attired to be safe while working in the lab. Which of the following items are required for admission to the general chemistry teaching lab? Select all that apply. -department approved safety glasses -long pants -shirt (with sleeves) that covers entire upper torso -flat soled shoes that cover the entire foot -hair longer than shoulder-length tied back

all of the above

When gathering glassware and equipment for an experiment, you should -clean any glassware that appears dirty. -examine all glassware for chips or cracks. -read all directions carefully to know what equipment is necessary. -all of the above.

all of the above

Horseplay or practical jokes in the laboratory are -not dangerous -okay -okay if you are working alone -always against the rules

always against the rules

Flammable materials, like alcohol, should never be dispensed or used near -another student -an open flame -a sink -an open door

an open flame

If you do not understand a direction or part of a lab procedure, you should -figure it out as you do the lab. -skip it and move on to the next part. -ask the TA before proceeding. -try several methods until something seems to work.

ask the TA before proceeding.

Approved eye protection devices (such as goggles) are worn in the laboratory -at all times -to avoid eye strain -to improve your vision -only if you don't have corrective glasses

at all times

You are heating a substance in a test tube. Always point the open end of the tube -away from all people. -toward yourself. -toward another classmate. -toward your lab partner.

away from all people.

Which is the best definition of the term 'cryogenic'? -may cause cancer -poses a threat to the health of living organisms -being or related to very low temperature -being or related to very high temperature -none of these

being or related to very low temperature

Is 1-naphtol air and/or light sensitive? -air sensitive only -light sensitive only -neither light nor air sensitive -both air and light sensitive -impossible to determine

both air and light sensitive

Which is the best definition of teratogen? -can cause birth defects -can cause cancer -can cause ruptures in skin on exposure -explosive

can cause birth defects

Which is the best definition of corrosive? -can cause damage to living tissue -can irritate eyes and cause tearing -can cause birth defects -can cause cancer

can cause damage to living tissue

Which is the best definition of mutagen? -can cause radiation -can cause genetic mutation -can cause birth defects -can cause cancer

can cause genetic mutation

Which is the best definition of lachrymator? -can result in skin rash -irritates the lungs -burns the skin -can irritate eyes and cause tearing

can irritate eyes and cause tearing

Which is the best definition of asphyxiant? -poisonous -spontaneously catches on fire -ignites in air -can result in suffocation

can result in suffocation

The following footwear is best in the laboratory. -crocs -closed-toed shoes -open-toed shoes -sandals

closed-toed shoes

What color is silver nitrate? -white -yellow -colorless -silver -orange

colorless

Which descriptor of eye protection best identifies the eye protection shown: - face shield -fluid resistant shield -safety goggles -safety glasses

safety glasses

What is the 'signal word' (if any) for silver nitrate? -danger -warning -alert -none

danger

If a lab experiment is not completed, you should -sneak into a different lab period to finish. -copy the results from another student in the lab. -discuss the issue with your instructor/TA. -make up results.

discuss the issue with your instructor/TA.

After completing an experiment, all chemical wastes should be -disposed of according to your TA's directions. -dumped in the sink. -left at your lab station for the next class. -taken home.

disposed of according to your TA's directions.

If I make a mistake in my lab notebook, I should... -tear out the page and throw it away -write the correct information on top of the mistake -scribble out the mistake -use white-out to cover up the mistake -draw a single line through the mistake, then enter the correct information

draw a single line through the mistake, then enter the correct information

Chipped or cracked glassware is okay to use. (T/F)

false

Cryogenics are stored at high temperatures. (T/F)

false

Halogens are unreactive. (T//F)

false

Hot objects can be placed directly on the lab benchtop to cool. (T/F)

false

Hydrogen gas is considered a carcinogen. (T/F)

false

I can wear any type of safety glasses or goggles in the lab. (T/F)

false

I should address my instructor by their first name, informally. (T/F)

false

I should feel free to use emoticons (i.e. smiley faces) in correspondence with instructors/TAs. (T/F)

false

I should use abbreviations in email correspondence with instructors/TAs. Such as: u, b4, etc. (T/F)

false

If I have a question I should post it to the Q&A without reading through the Q&A to see if the question has already been asked. (T/F)

false

It is OK to temporarily remove my safety glasses/goggles while in the laboratory to clean them. (T/F)

false

Magnesium chloride solution is considered flammable. (T/F)

false

Mercury is readily absorbed through the skin. (T/F)

false

Oxidizing agents and reducing agents should be stored close to one another for safety. (T/F)

false

Peroxides can be stored indefinitely. (T/F)

false

This concentration of HCl solution is considered flammable. (T/F)

false

This concentration of aqueous HCl is light blue in color. (T/F)

false

You can always tell if an object is hot by looking at it. (T/F)

false

Personal eyeglasses provide as much protection as -safety glasses. -a face shield. -splashproof chemical goggles. -none of the above.

none of the above.

You have been injured in the laboratory (cut, burn,etc.). First you should -call your doctor after class. -visit the infirmary after class. -apply first aid on your own. -notify your TA/instructor immediately.

notify your TA/instructor immediately.

If a laboratory fire erupts, immediately -open the windows -run for the fire extinguisher -notify your instructor -throw water on the fire

notify your instructor

If an acid is splashed on your skin, wash at once with -weak base -plenty of water -soap -oil

plenty of water

What should be used to extinguish a fire containing silver nitrate? -carbon dioxide -halons -water -tri-class dry chemical

water

Which form of eye protection is most appropriate for use in the general chemistry lab? -laser eyewear -dust goggles -safety glasses or goggles -fluid resistant shield

safety glasses or goggles

Which descriptor of eye protection best identifies the eye protection shown: -face shield -safety glasses -fluid resistant shield -safety goggles

safety goggles

Shown is the NFPA diamond for sodium (Na). What is the health hazard of Na? blue-3 red-3 yellow-2 white-W -lethal -serious or permanent injury -significant irritation -reacts violently with water

serious or permanent injury

An acetone wash bottle is shown below. What is the stability of acetone? blue-1 red-3 yellow-0 white- blank -unstable at high temperatures -stable -can be ignited under almost all ambient temperatures -may explode at high temperature -none

stable

Hot glass looks the same as cold glass.(T/F)

true

Hydrogen gas is considered an asphyxiant. (T/F)

true

Hydrogen gas is considered flammable. (T/F)

true

I should always log out of my sessions in Canvas when finished a sitting. (T/F)

true

I should always mute my microphone when in Zoom meetings unless I've been instructed otherwise. (T/F)

true

I should dress appropriately for Zoom sessions. (T/F)

true

It is important to check glassware for scratches, nicks and cracks before heating. (T/F)

true

It is safe to wash with water if one's skin is exposed to magnesium chloride solution. (T/F)

true

Long hair should be tied back when using a Bunsen burner. (T/F)

true

Magnesium is considered flammable. (T/F)

true

Magnesium reacts with water and acid solutions. (T/F)

true

Never remove chemicals or other equipment from the laboratory (T/F)

true

Pyrophoric substances can burn spontaneously in air. (T/F)

true

Read all procedures thoroughly before entering the laboratory. (T/F)

true

Water can be safety added to this concentration of aqueous HCl solution. (T/F)

true

When sending an email to an instructor/TA I should include a descriptive subject/topic. (T/F)

true

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. (T/F)

true

Work areas should be kept clean and tidy. (T/F)

true

Zoom sessions may be recorded. My video/audio may be released to other students in the course. (T/F)

true

You are heating a piece of glass and now want to pick it up. You should -use a rag or paper towels. -pick up the end that looks cooler. -use tongs. -pour cold water on it.

use tongs.

When you finish working with chemicals, biological specimens, and other lab substances, always -treat your hands with skin lotion -wipe your hands on a towel -wash your hands thoroughly with soap and water -wipe your hands on your clothes

wash your hands thoroughly with soap and water

Is silver nitrate light sensitive? -yes -no -unknown

yes

If a piece of equipment is not working properly, stop, turn it off, and tell -the custodian -your lab partner -your best friend in the class -your TA/lab staff

your TA/lab staff