Why should a used chemical container never be refilled?

Used chemical containers can be contaminated and an unexpected and potentially unpleasant reaction can occur.

What are the safety rules in chemistry?

• Know locations of laboratory safety showers, eyewashstations, and fire extinguishers.
• Know emergency exit routes.
• Avoid skin and eye contact with all chemicals.
• Minimize all chemical exposures.
• No horseplay will be tolerated.
• Assume that all chemicals of unknown toxicity are highly toxic.

What are the safety precautions in chemistry laboratory?

Never use laboratory glassware for eating or drinking purposes. Do not apply cosmetics while in the laboratory or storage area. Wash hands after removing gloves, and before leaving the laboratory. Remove any protective equipment (i.e., gloves, lab coat or apron, chemical splash goggles) before leaving the laboratory.

What is the safety rule concerning working alone in the laboratory?

Rule #1: If at all possible, avoid working alone in a laboratory. If solo work is unavoidable, work during prime or peak hours or make sure someone is working nearby. Try enlisting a partner to work with you.

What are the 10 laboratory safety rules?

• of 10. The Most Important Lab Safety Rule.
• of 10. Know the Location of Safety Equipment.
• of 10. Dress for the Lab.
• of 10. Don’t Eat or Drink in the Laboratory.
• of 10. Don’t Taste or Sniff Chemicals.
• of 10. Don’t Play Mad Scientist in the Laboratory.
• of 10. Dispose of Lab Waste Properly.
• of 10.

What are the 5 most important lab safety rules?

• Dress appropriately.
• Keep a tidy lab.
• Know your lab safety symbols.
• Handle chemical spills properly.
• Know your safety equipment.
• Test your skills in our Lab Safety simulation.

What are the most important laboratory safety rule?

Wear protective lab attire: Make sure you use PPE at all times inside the laboratory. Put on a lab coat with full sleeves, closed-toe shoes, and safety goggles before entering the lab. If you have long hair, it’s better to keep it tied and out of the way when working in the lab.

What are 3 safe lab procedures?

Dress for work in the laboratory. Wear clothing and shoes that cover exposed skin and protect you from potential splashes. Tie back long hair, jewelry, or anything that may catch in equipment. Never eat food, drink beverages, chew gum, apply cosmetics (including lip balm), or handle contact lenses in the laboratory.

Which of the following is not a laboratory safety rules?

Mostly acid-base mixing reactions are exothermic reactions which releases heat energy which can harm the person. So, it is advised to not mix acid and bases in the laboratory.

What should you not do in a science lab?

• Wearing open-toed shoes.
• Keeping long hair down.
• Eating or drinking.
• Erasing data from your notebook.
• Showing up late.
• Forgetting to label samples or materials.
• Incorrectly disposing of your materials.
• Wearing shorts.

Can a student work alone in a laboratory?

The requirements are: High School Students: Never permitted to work alone in a research lab, even with non-hazardous materials. They must always have a mentor/supervisor present.

What are the rules in a science lab?

• Act responsibly in the science classroom / lab.
• Follow all written and verbal instructions carefully.
• Never work alone.
• Do not touch equipment or chemicals in the lab until your teacher gives instructions.
• Do not eat, drink or chew gum in the science classroom / lab.
• Do not drink from lab containers.

What are 5 precautions that must be taken before beginning an experiment?

• Wash hands.
• Remove any jewelry.
• Tie back long hair.
• Wear proper clothing (no loose clothes, close-toed shoes, long pants and sleeves)
• Wear safety googles and gloves.

What action should you take if you accidentally break an empty test tube during an experiment?

Imagine that you accidentally break an empty test tube during an experiment. What action should you take? Use a dust broom to sweep it up and throw it away.

Should you return all unused chemicals to their original containers?

7. Never return unused chemicals to the reagent bottles. This is a source of possible contamination of the entire contents of the stock bottle. Dispose of unused chemicals exactly as instructed in the waste disposal instructions for that substance, identified by throughout each experiment.

Why rules are important in the laboratory?

By becoming familiar with the laboratory you’re working in and always following proper safety procedures, you can help to prevent or eliminate hazards. You will also know the proper steps to take in the unfortunate event that something does go wrong.

What is the first rule of lab safety?

Students must be made to wear safety goggles, lab coat, and shoes in the science laboratory. Loose clothes, sandals, and open hairs should be a strict NO in school science labs. Examine glassware before using. Do not use chipped or cracked test tubes or beakers.

Which of the following is the most common accidents in chemistry laboratory?

Answer and Explanation: The most common type of lab accident is accidental cuts to the hands due to handling broken glass.

What is laboratory hazard?

Laboratory hazard is defined as anything that has a potential to cause damage. People working in the laboratory are exposed to potential hazards.

What safety precautions must be observed in this experiment?

• No food or drink is allowed in lab unless food or drinks are provided as a part of the lab.
• Shoes must be worn in lab.
• If you have very long hair, please tie it back in the laboratory.
• Handle chemicals, reagents, and stains carefully and follow all warnings.

What are 4 important things you should do at the end of every lab?

• Clean up your work area.
• Turn off and unplug any equipment and return it to its proper place.
• Some waste should not be throw in the trash or poured down the drain. Listen to your teacher’s instructions about proper disposal.

How do I study for a chemistry lab exam?

1. Flashcards. Review terms and definitions.
2. Learn. Focus your studying with a path.
3. Test. Take a practice test.
4. Match. Get faster at matching terms.

What do you do inside the laboratory?

• Do Wear Eye Protection.
• Do Practice Fire Safety.
• Do Handle Glassware Safely.
• Do Keep Notes.
• Do Wear Gloves.
• Do Wear Closed-Toed Shoes.
• Do Practice Electrical Safety.
• Don’t Eat or Drink in the Lab.

Which of the following is not a permitted item of dress in the laboratories?

The following items of clothing are NOT permitted: shorts, cropped or capri pants, skirts/dresses that are not full length (i.e. must reach the tops of the shoes), tights, leggings, exercise pants, and other tight-fitting synthetic materials.

Is it safe to work alone?

Working alone is completely legal and in most cases it is safe to do so. However, a risk assessment should be carried out on lone working activities so employers can assess and mitigate any potential dangers to their staff.