Lab Safety Rules

safety goggles, shatter-proof lenses, side shields, splashes, eyes, skin, eyewash, lab instructor

Rule #1

• always wear ? with ? and ? whenever in the lab

• chemical ? near your ? or on your ? should be immediately washed at the ? (consult your ?)

safety gloves, acids, bases, organic solvents

Rule #2

• always wear ? when handling concentrated ?, ?, and ?

closed-toed shoes, loose-ends, long hair, scarves, ties

Rule #3

• always wear ?

• avoid ?

  • tie back ?

  • remove ?, ?, etc

eat, drink, water

Rule #4

• Never ? or ? in the lab

  • Not even ?

alert, awake, aware, accidents, serious attitude, clean, breakables, edge, bulky, ask, borrowing

Rule #5

• Always be ?, ?, and ? to avoid ?

• maintain a ?

  • no horseplay or unauthorized experiments

• keep area ?

• keep ? away from the ?

• no ? materials in lab

• always ? before ? other group’s materials

oughter, concentrated acid, water

Rule #6

• Do as you ?, pour ? into ?

  • NEVER the other way around

pipet, liquid, mouth, bulb, taste, smell, vapors, gases, waft

Rule #7

• Never ? any ? by ? (use a ? instead)

• Never ? anything

• Never directly ? the sources of ? or ? (instead ?)

glassware, cracks, glassware, labeled box, fume hood

Rule #8

• always check ? for ?

  • broken ? does not go into the trashcan, it goes into the ? under the ?

chemicals, scale, balance, warm, cool, inaccurate, damage

Rule #9

• When weighing, don’t place ? directly on the ? or ?

  • Never weigh ? objects, allow them to ? to room temperature

    • If you fail to understand this rule, you’ll get ? massings and will ? the equipment

reagents, reagents, reagent bottle, reagent-bottle stopper, desk, hand, stopper

Rule #10

• Dispose of excess ? as instructed

• Never return ? to the ?

• Do not place ? on the ?

  • Just hold it in your ?

  • Replace the ? ASAP

centrifuge, balanced, tube, tube, volume, water, spinning centrifuge

Rule #11

• Always make sure a ? is ? before you turn it on

• If there’s only ?, place another ? with a similar ? of ? directly across

  • Never open a ?

chemicals, dangerous, chemicals, chemicals, sink, chemical spill

Rule #12

• Consider all ? to be ? unless told otherwise

• Dispose of ? as directed

• Do not put any ? into the ? unless permitted

• In the case of a ?, notify the instructor immediately

volatile, skin-irritating, strong-smelling, dangerous, fume exhaust hood, away, pull-down window, minor explosions

Rule #13

• Reactions involving ?, ?, ?, or ? chemicals should be handled in the ?

• Turning it on will move air ? from the user

• the ? shields you from ?

fire extinguisher, pull, ring, aim, base, squeeze, sweep, STOP, DROP, ROLL

Rule #14

• Know how to use a ?

• Activate it using PASS

  • ? the metal safety ?

  • ? at the ? of the flames

  • ? the handle

  • ? the hose to extinguish all flames

• If the fire continues, evacuate the lab and call 911

• If clothing catches on fire, ?, ?, and ?

hot plate, bunsen burner, on, glass, porcelain, heat-tolerant, warm, wire gauze, cap, heated, point, heated, erupt

Rule #15

• always stay with a ? or ? if it’s turned ?

  • ? and ? should be ?

• put ? objects on ? to cool

• never ? a container if it is being ?

• never ? a test tube at anyone if it’s being ?

  • it might ?

HNO3, NO2, toxic, fume hood, baking soda, safety goggles, gloves, lab coat

Safety Demo #1 (Polluting Pennies)

• Concentrated ? generated ? which is ?

• Safety procedures

  • done in a ?

  • had ? readily in a cup

  • ?, ?, and ? on

eye, proteins, water-based, H2SO4, NaOH, cooks, denatures, slimes

Safety Demo #2 (Don’t be an Egghead)

• Raw eggs represent an ? as they both contain ? and are ?

• We add concentrated ? and ? to different parts of the egg whites

  • The former ? and ? the proteins in the white

  • The latter ? up the whites

    • Surely you don’t want that to happen to your eyes…

NH3, CuSO4, Cu(OH)2, navy blue, navy blue, [Cu(NH3)4]2+, precipitate

Safety Demo #3 (A Little or a Lot, Waft with Me!)

• Concentrated ? is added to ?

  • we only add a little at first

    • precipitates into ?

    • small ? clouds

  • then we add a lot

    • instantly becomes all ? due to a ? complex

    • you can’t see any ?

sugar, H2SO4, carbon, water vapors, SO2, dehydrating agent, fume hood

Safety Demo #4 (Sweet and Sour)

• ? and concentrated ? are mixed

• ?, ?, and ? are the products

  • a cool carbon snake is made

• the acid is a ?

• if you heat the reaction in a test tube, the carbon will climb the sides

• needs to be done in a ?

KClO3, test tube, gummy bear, KClO3, O2, gummy bear, oxidation

Safety Demo #5 (Poor Little Gummy)

• Reaction where we heat up ? inside a ? then add a ?

• heating the ? will generate ?

• once you put the ? in, it bursts into flames due to rapid ?

• this lab stresses the importance of not pointing a test tube at anyone while it’s being heated