Chemistry Lab Safety

1. What should be worn in a laboratory at all times to decrease the likelihood of eye injury?

Corrective lenses

Safety Glasses

A mask

Nothing

Always wear some protection.

Explanation

Always wear some protection.

2. Whom should you call in case of an emergency in the lab?

# Instructor

Nobody

A friend

Anybody

In case of an emergency in the lab, it is best to call the instructor. The instructor is the person who is responsible for the lab and has the knowledge and authority to handle emergency situations. They can provide guidance, assistance, and ensure the safety of everyone involved. Calling a friend or anybody may not be the most appropriate option as they may not have the necessary expertise or resources to effectively address the emergency.

Explanation

In case of an emergency in the lab, it is best to call the instructor. The instructor is the person who is responsible for the lab and has the knowledge and authority to handle emergency situations. They can provide guidance, assistance, and ensure the safety of everyone involved. Calling a friend or anybody may not be the most appropriate option as they may not have the necessary expertise or resources to effectively address the emergency.

3. What type of footwear is required in the lab?

Shoes are optional

Hard-soled, covered shoes

Sandals

Something in a low heel

This will protect your feet from spills and stepping on things.

Explanation

This will protect your feet from spills and stepping on things.

4. What precautions are needed with long hair and beards?

Must be shampooed

Keep long hair tied back/keep hair away from flames

No long hair and/or beards allowed in the lab

## No precautions are necessary

Precautions are needed with long hair and beards to prevent any accidents or hazards in certain situations. Keeping long hair tied back and away from flames is necessary to avoid the risk of hair catching fire and causing injuries. This precaution is particularly important in environments where there may be open flames or flammable materials present.

Explanation

Precautions are needed with long hair and beards to prevent any accidents or hazards in certain situations. Keeping long hair tied back and away from flames is necessary to avoid the risk of hair catching fire and causing injuries. This precaution is particularly important in environments where there may be open flames or flammable materials present.

5. Eating and drinking is not permitted in the lab because:

There would not be enough time to finish the experiment

The storeroom serves terrible appetizers

You could be poisoned

The lab would become quite messy with this type of activity

Eating and drinking in the lab is not permitted because it could lead to the risk of poisoning. Consuming food or beverages in the lab increases the chances of contamination, as there may be hazardous chemicals or substances present. Ingesting these substances can be harmful to health and may lead to poisoning. Therefore, it is important to avoid eating and drinking in the lab to maintain a safe and controlled environment.

Explanation

Eating and drinking in the lab is not permitted because it could lead to the risk of poisoning. Consuming food or beverages in the lab increases the chances of contamination, as there may be hazardous chemicals or substances present. Ingesting these substances can be harmful to health and may lead to poisoning. Therefore, it is important to avoid eating and drinking in the lab to maintain a safe and controlled environment.

6. What should be the very last function performed in the lab before you leave?

Arrange a time with your lab partner for lunch

Wash your hands

Make sure that your locker is secure

Bid the instructor farewell

You wouldn't want to carry trace chemicals out from the lab on your hands.

Explanation

You wouldn't want to carry trace chemicals out from the lab on your hands.

7. What would immediately be used if your clothing caught fire or if a large chemical spill had occured on your clothing?

Fire extinguisher

Safety shower

Laboratory sinks

Eye-wash fountain

A safety shower would immediately be used if your clothing caught fire or if a large chemical spill had occurred on your clothing. Safety showers are designed to provide a quick and effective way to rinse off hazardous substances or extinguish fires on the body. They typically have a large overhead showerhead that releases a steady stream of water to douse the flames or wash away the chemicals. Using a safety shower promptly can help minimize the extent of injuries and prevent further damage.

Explanation

A safety shower would immediately be used if your clothing caught fire or if a large chemical spill had occurred on your clothing. Safety showers are designed to provide a quick and effective way to rinse off hazardous substances or extinguish fires on the body. They typically have a large overhead showerhead that releases a steady stream of water to douse the flames or wash away the chemicals. Using a safety shower promptly can help minimize the extent of injuries and prevent further damage.

8. Describe the procedure for smelling a chemical.

Stick your nose close to the vessel and breath deeply

Point vessel away from face while gently fanning vapors toward nose

Never smell a chemical

Smell chemical as you would anything else

Valuable information can be gained from smelling some chemicals.

Explanation

Valuable information can be gained from smelling some chemicals.

9. Why are no unauthorized experiments permitted in the lab?

The student lacks experience in the lab

Most professors love to see only their selected experiments performed

The stockroom may not have the reagents that you need

# It may take more time to perform than expected

Unauthorized experiments are not permitted in the lab because the student lacks experience in the lab. This implies that conducting experiments without proper knowledge and experience can be dangerous and may lead to accidents or errors. To ensure safety and accuracy in the lab, it is important to only perform experiments that have been authorized and supervised by experienced individuals.

Explanation

Unauthorized experiments are not permitted in the lab because the student lacks experience in the lab. This implies that conducting experiments without proper knowledge and experience can be dangerous and may lead to accidents or errors. To ensure safety and accuracy in the lab, it is important to only perform experiments that have been authorized and supervised by experienced individuals.

10.

When you are finished using a bunsen burner you should:

Leave it on for the next person to use. It's the only considerate choice.

Cover the burner with an inverted beaker to suffocate the flame. It works well for candles, too.

Turn off the gas. Duh!

The correct answer is "Turn off the gas. Duh!" This is the appropriate action to take when finished using a bunsen burner to ensure safety and prevent accidents. Leaving the burner on for the next person is not considerate as it can be dangerous. Covering the burner with an inverted beaker may not completely suffocate the flame and can still pose a risk. Pulling off the hose may lead to gas leakage and potential fire hazards. Turning off the gas is the most logical and safe choice to make.

Explanation

The correct answer is "Turn off the gas. Duh!" This is the appropriate action to take when finished using a bunsen burner to ensure safety and prevent accidents. Leaving the burner on for the next person is not considerate as it can be dangerous. Covering the burner with an inverted beaker may not completely suffocate the flame and can still pose a risk. Pulling off the hose may lead to gas leakage and potential fire hazards. Turning off the gas is the most logical and safe choice to make.

11. Why is it not advisable to wear contact lenses in the lab?

Lenses could inadvertently fall out of the eye

Chemical vapor could become trapped between the lenses and the eye

Chemical vapor could literally react with the lenses

All of the above

It is not advisable to wear contact lenses in the lab because there are multiple risks involved. Lenses could accidentally fall out of the eye due to the nature of lab work, which can be dangerous if hazardous materials are present. Chemical vapor can become trapped between the lenses and the eye, leading to irritation or injury. Additionally, chemical vapor can react with the lenses themselves, potentially damaging them or causing a harmful reaction. Therefore, all of the given reasons make it unsafe to wear contact lenses in the lab.

Explanation

It is not advisable to wear contact lenses in the lab because there are multiple risks involved. Lenses could accidentally fall out of the eye due to the nature of lab work, which can be dangerous if hazardous materials are present. Chemical vapor can become trapped between the lenses and the eye, leading to irritation or injury. Additionally, chemical vapor can react with the lenses themselves, potentially damaging them or causing a harmful reaction. Therefore, all of the given reasons make it unsafe to wear contact lenses in the lab.