suggest some precautionary measures before woprking in laaboratory?

Answer 1

Here's what I would suggest:

1. Do your homework! Make sure you are familiar with the procedures you intend to follow. Starting in without having prepared yourself is a recipe for disaster.
2. Familiarize yourself with the laboratory. Make sure you know where the fire extinguishers, emergency showers, eyewash stations, spill cleanup kits, and exits are located.
3. Take note of where chemicals are stored. Acids, bases, and flammables should all be stored separately. If you take something out of one of these storage areas, be sure you put it back where you found it.
4. Always, always wear your PPE (personal protective equipment). This includes apron or labcoat, goggles or safety glasses with side shields, appropriate gloves when working with chemicals, face shield if working with particularly toxic or otherwise dangerous chemicals, long trousers, a long-sleeved shirt if you're wearing an apron, and sturdy shoes (no sandals!).
5. Always work in a properly ventilated laboratory hood. Your lab hood should have a face velocity of at least 100 ft/sec for working with most organic chemicals.
6. This is the most important safety precaution of all. If you are not sure how do something safely, ASK. Ask a professor, ask a supervisor, ask a lab TA, ask SOMEBODY. If you don't get an answer that you feel will allow you to work safely, then don't do anything. Work safely or not at all.

Answer 2

Always wear an apron and goggles - anytime there are chemicals around of any kind. Also use gloves whenever necessary. Keep hazardous chemicals in the hood. Do not sniff any chemicals - waft if necessary. Know where are the emergency materials are in case anything happens. I'm sure there is more but I can't think of any right now. Hope this helped!

Answer 3

On a fundamental level (perhaps too fundamental), accidents are the uncontrolled transfers of energy, be it chemical, thermal, kinetic. In addition to the basic gear listed above, do nothing in the laboratory that you haven't thought about before hand and consider what might happen of something were to go wrong. Example, I have seen students evaporating an aqueous solution in a test tube to dryness over a Bunsen burner. Sometimes, a large steam bubble will form and shoot out of the tube. I've been hit with one of them, all because the student didn't realize they were aiming the test tube right at me.

Answer 4

Remember to wash your hands right after you leave lab since gloves aren't perfect. I feel like 'emergency materials' is a little vague. Find the eyewash, chemical shower, fire extinguisher, fire blanket if you have one, spill kits for various materials. Also, know your procedures well so you can anticipate where issues may come up. And if you work with concentrated HCl at any point, which I'm guessing you will, don't hold it under your nose because you'll burn your nasal lining right off. Ow

Answer 5

1. Before you enter the lab, ensure that you have on you your gloves, your lab coat, goggles and your experiment which you will carry out. Note all that you have to do in the experiment beforehand in your mind.
2. When you enter the lab, do not run once in the lab.
3. Verify that all the required solutions are given to you and ask for assistance if one is missing or if you have been given another solution.
4. Place all your materials into a neat pile in a corner where it will not embarass you when you perform your experiment.