When should a lab coat, safety goggles, and gloves be worn in the laboratory?

always, no exceptions

always, unless the teacher instructs otherwise

only when the teacher says to wear them

never in chemistry labs

The MSDS for chloroform indicates that it is a clear liquid that has a pleasant smell and substantial vapor pressure. People should avoid inhaling its vapors, and it is sensitive to light. Malik needs 10 mls of chloroform for an experiment. According to this information, how should he safely pour the chloroform?

He should locate the chloroform stored in a transparent container in chemical storage and pour directly into his beaker from that location.

He should locate the chloroform stored in a transparent container in chemical storage and should take it to the fume hood to pour.

He should locate the chloroform stored in a dark container in chemical storage and should take it to the fume hood to pour.

He should locate the chloroform stored in a dark container in chemical storage and pour directly into his beaker from that location.

What is the best reason for a student to remove a dangling bracelet when heating test tubes of acidic solutions in a hot-water bath in a chemistry lab?

to avoid reactions of the metal with gases in the lab

to reduce the risk of burns from heat conducted through the metal

to minimize the chance the bracelet pulling over a test tube, causing a spill

to prevent misreading the temperature of the bath on a thermometer

Denise heats a beaker of dilute acid on a hot plate in a fume hood. What should Denise wear to best protect herself when she transports the beaker to a balance outside the hood?

heat-proof gloves, a lab coat, and close-toed shoes

goggles, a lab coat, and close-toed shoes

goggles, a lab coat, and heat-proof gloves

goggles, a lab coat, heat-proof gloves, and close-toed shoes

Jerome and a classmate are conducting an experiment. Which piece of safety equipment is least likely to be at Jerome’s lab station?

goggles

a fire extinguisher

heat-proof gloves

a lab coat

What are close-toed shoes least likely to provide protection against?

hydrogen gas produced during a reaction

spilled water from a hot-water bath

broken glass from a dropped test tube

acid leaking from a cracked beaker

The MSDS for benzene indicates that it is a clear liquid that has a substantial vapor pressure. It has a health rating of 2, a fire rating of 3, and a reactivity rating of 0. It is a cancer-causing agent. Based on this information, which statement about benzene is accurate?

Benzene readily reacts with moist air.

Benzene explodes if the container is shaken.

Benzene must be kept away from flames.

Benzene must be stored under high pressure.

Zachary, a lab instructor, is writing a safety contract that his chemistry class will use for an experiment. He mentions that students should not eat or drink in the lab. Which other item should also be included?

Do not wear hats in the lab.

Do not bring backpacks to the lab.

Do not open any windows in the lab.

Do not chew gum in the lab.

Forrest spills some acid on the lab floor. He notifies his teacher and begins to look for baking soda to neutralize the acid on the floor. Who should be notified next?

other students in the lab

the police department

lab stockroom personnel

the fire department

What emotional state is important to maintain while reporting an accident in the lab?

fear

anxiety

calmness

embarrassment

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