Monday, May 24, 2021

Chemistry Lab Safety Test Answers


  • Call for the location of the unit closest to you. Have old or unused equipment and supplies removed by faxing a Transfer of Equipment form to This action, along with the removal of old waste materials will serve to free up much needed appropriate...
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  • Incompatibles should be separated by sufficient distance, a wall, or a berm. Common Problems and Solutions for Labs Using Radioactivity Failure to perform or document wipe tests Wipe tests must be performed and documented at least monthly in labs...
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  • In large part to those two courses, we have made large strides in fostering a positive safety culture here at SUNY Plattsburgh. Great that webinar is an option otherwise I would not be able to attend. They have the patience to really check and comment on the answers in the quizzes. From attending your course, I started to develop the lab safety manual including a chemical hygiene plan. All started from your course. Thank you! Caicai Wu, Ph. The wealth of info he has at his fingertips is very impressive.
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  • Of course, safety rules are only effective when they are enforced, which is why strong lab management is so important to a safe laboratory as well. Knowing the proper laboratory safety signs and symbols is also important. They cover what you should know in the event of an emergency, proper signage, safety equipment, safely using laboratory equipment, and basic common-sense rules. Be sure to read all fire alarm and safety signs and follow the instructions in the event of an accident or emergency. Make sure you know where your lab's safety equipment—including first aid kit s , fire extinguishers, eye wash stations, and safety showers—is located and how to properly use it.
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  • Know emergency phone numbers to use to call for help in case of an emergency. Lab areas containing carcinogens, radioisotopes, biohazards, and lasers should be properly marked with the appropriate warning signs. Open flames should never be used in the laboratory unless you have permission from a qualified supervisor. Make sure you are aware of where your lab's exits and fire alarms are located. An area of 36" diameter must be kept clear at all times around all fire sprinkler heads. If there is a fire drill, be sure to turn off all electrical equipment and close all containers. Always work in properly-ventilated areas. Do not chew gum, drink, or eat while working in the lab. Laboratory glassware should never be utilized as food or beverage containers. Each time you use glassware, be sure to check it for chips and cracks.
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  • Notify your lab supervisor of any damaged glassware so it can be properly disposed of. Never use lab equipment that you are not approved or trained by your supervisor to operate. If an instrument or piece of equipment fails during use, or isn't operating properly, report the issue to a technician right away. Never try to repair an equipment problem on your own. If you are the last person to leave the lab, make sure to lock all the doors and turn off all ignition sources. Do not work alone in the lab. Never leave an ongoing experiment unattended. Never lift any glassware, solutions, or other types of apparatus above eye level. Never smell or taste chemicals. Do not pipette by mouth. Make sure you always follow the proper procedures for disposing lab waste. Report all injuries, accidents, and broken equipment or glass right away, even if the incident seems small or unimportant.
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  • If you have been injured, yell out immediately and as loud as you can to ensure you get help. In the event of a chemical splashing into your eye s or on your skin, immediately flush the affected area s with running water for at least 20 minutes. If you notice any unsafe conditions in the lab, let your supervisor know as soon as possible. Housekeeping safety rules Laboratory housekeeping rules also apply to most facilities and deal with the basic upkeep, tidiness, and maintenance of a safe laboratory.
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  • Always keep your work area s tidy and clean. Make sure that all eye wash stations, emergency showers, fire extinguishers, and exits are always unobstructed and accessible. Only materials you require for your work should be kept in your work area. Everything else should be stored safely out of the way. Only lightweight items should be stored on top of cabinets; heavier items should always be kept at the bottom. Solids should always be kept out of the laboratory sink. Any equipment that requires air flow or ventilation to prevent overheating should always be kept clear. For example skirts and shorts might be nice for enjoying the warm weather outside, but quickly become a liability in the lab where skin can be exposed to heat or dangerous chemicals. Always tie back hair that is chin-length or longer. Make sure that loose clothing or dangling jewelry is secured, or avoid wearing it in the first place. Never wear sandals or other open-toed shoes in the lab.
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  • Footwear should always cover the foot completely. Never wear shorts or skirts in the lab. When working with Bunsen burners, lighted splints, matches, etc. Personal protection safety rules Unlike laboratory dress code policies, rules for personal protection cover what employees should be wearing in the lab in order to protect themselves from various hazards, as well as basic hygiene rules to follow to avoid any sort of contamination. When handling any toxic or hazardous agent, always wear the appropriate gloves. When performing laboratory experiments, you should always wear a smock or lab coat. Before leaving the lab or eating, always wash your hands. After performing an experiment, you should always wash your hands with soap and water.
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  • Every chemical should be treated as though it were dangerous. Do not allow any solvent to come into contact with your skin. All chemicals should always be clearly labeled with the name of the substance, its concentration, the date it was received, and the name of the person responsible for it. Before removing any of the contents from a chemical bottle, read the label twice. Never take more chemicals from a bottle than you need for your work. Do not put unused chemicals back into their original container. Chemicals or other materials should never be taken out of the laboratory. Chemicals should never be mixed in sink drains. Flammable and volatile chemicals should only be used in a fume hood. If a chemical spill occurs, clean it up right away. Ensure that all chemical waste is disposed of properly. Chemistry lab safety rules As chemistry labs are one of the most common types, these basic chemistry lab safety rules are relevant to many scientists, dealing with the safe performance of common activities and tasks in the average chemistry lab: Before you start an experiment, make sure you are fully aware of the hazards of the materials you'll be using.
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  • When refluxing, distilling, or transferring volatile liquids, always exercise extreme caution. Always pour chemicals from large containers to smaller ones. Never pour chemicals that have been used back into the stock container. Never tap flasks that are under vacuum. Chemicals should never be mixed, measured, or heated in front of your face. Water should not be poured into concentrated acid. Instead, pour acid slowly into water while stirring constantly. In many cases, mixing acid with water is exothermic. Electrical safety rules Like almost every other workplace, laboratories contain electronic equipment. Electrical safety rules help prevent the misuse of electronic instruments, electric shocks and other injuries, and ensure that any damaged equipment, cords, or plugs are reported to the appropriate authorities so they can be repaired or replaced.
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  • Before using any high voltage equipment voltages above 50Vrms ac and 50V dc , make sure you get permission from your lab supervisor. High voltage equipment should never be changed or modified in any way. Always turn off a high voltage power supply when you are attaching it. Use only one hand if you need to adjust any high voltage equipment. It's safest to place your other hand either behind your back or in a pocket. Make sure all electrical panels are unobstructed and easily accessible.
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  • Whenever you can, avoid using extension cords. In particular, accidents due to reflection are something that many employees may not think about. A clear set of rules for the use of lasers is essential to ensure that everyone is aware of all hazards and that the appropriate personal protective equipment is worn at all times. Even if you are certain that a laser beam is "eye" safe or low power, you should never look into it. Always wear the appropriate goggles in areas of the lab where lasers are present. The most common laser injuries are those caused by scattered laser light reflecting either off the shiny surface of optical tables, the sides of mirrors, or off of mountings.
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  • Goggles will help you avoid damage from such scattered light. You should never keep your head at the same level as the laser beam. Always keep the laser beam at or below chest level. Laser beams should never be allowed to spread into the lab. Beam stops should always be used to intercept laser beams. Do not walk through laser beams.
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  • The boundaries between the physical and life sciences are artificial. With the advancements in science today, one field overlaps into another; e. Physics-Based Physical Science A. Electricity Given the inherent dangers in the laboratory study of electricity, safeguards and safety procedures need to be in place for students and teachers. Consider the following safety specifications in working with electricity: Know where the master switch is for electricity in the laboratory in case of an emergency. Make students aware of the appropriate use of electricity and dangers of misuse and abuse. When using batteries, always inspect them first for damage including cracks, leakage.
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  • Discard in an environmentally appropriate way if any of these conditions occur. When unplugging cords, always pull cords from the plug at the electrical receptacle and never pull the cords from the wire. Use only ground fault interrupt circuits GFI protected circuits! Remove all conductive or metallic jewelry before working with electricity. Prevent trip and fall hazards by placing wires away from places where people walk.
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  • For routine maintenance like changing bulbs, make sure the device is unplugged before initiating the work. Never open a battery. The contents are corrosive and can be toxic or poisonous. When storing batteries, never allow the terminals to touch or short circuit. Be water phobic when working around electricity. Never use water or have wet hands when dealing with cords, plugs or electrical equipment. Never run a cord near or over a sink. Utility pipes such as water and gas are grounded. Do not touch an electrical circuit and utility pipes at the same time. Never plug damaged electrical equipment into a wall receptacle. This includes frayed wires, missing ground pin and bent plugs.
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  • Keep them at least 50 feet 12 meters away. Always use a surge protector inline with the generator's power cord. Students with epilepsy, heart or nervous system conditions, or pacemakers should never be in the proximity of an electrostatic generator. Never operate the generator near flammable or combustible materials. Never leave the machine operating unattended. Back to top C. Ionizing Radiation: The use of ionizing radiation sources in middle school science laboratories is not advocated given the potential for unsafe exposure levels and health indication. Back to top D. Mechanics: The study of mechanics in physical science provides many touchstones to everyday applications for students. However, laboratory activities in this area are not without safety concerns. Students and teachers can be injured if hit by rapidly moving objects or projectiles.
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  • Always use caution when dealing with projectiles, falling objects, moving equipment, exposed belts, powerful permanent magnets, sharps such as Exacto knives and razor blades, and springs. Special attention should be given to the following safety procedures when working with model rockets. Use only lightweight, nonmetal parts for the nose, body and fins of the rocket. Use only commercially made model rocket engines. To prevent accidental eye injury, place launchers so that the end of the launch rod is above eye level or cap the end of the rod when it is not in use. Do not tamper with rocket engines or use them for any purposes except those recommended by the manufacturer. Launch rockets outdoors, in an open area and in safe weather conditions with wind speeds no greater than 20 mph.
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