CHEMISTRY LAB EXAM #1 (RULES, ITEMS AND SYMBOLS)

LAB SAFETY RULES (Already know this)

Rule #1: Wear Safety goggles at all times (Protects eyes from chemicals, heat and broken glass)

Rule #2: No eating, drinking or chewing gum in the lab (Chemicals can spill)

Rule #3: Tie back long hair and secure loose clothing

Rule #4: Never run, play or fool around in the lab

Rule #5: Never touch equipment or chemicals without permission (Some chemicals can burn skin)

Rule #6: Report all accidents immediately

LAB EQUIPMENT

Beaker: Used to hold, mix or heat liquids, and it’s not used for accurate measuring.

Graduated Cylinder: Used to measure volume of liquids accurately.

Test Tube: Used to hold small amounts of substances, usually liquids

Test Tube Holder: Used to hold a hot test tube or one being heated.

Test Tube Rack

Function: holds test tubes upright
Memory trick: Parking lot for tubes

(Used to hold a hot test tube or one being heated.)

6. Test Tube Brush

Function: cleans test tubes
Memory trick:
Long skinny brush → fits inside tubes.

7. Beaker Tongs

Function: holds hot beakers
Memory trick: (The front part looks like a alligator eater)
Wide grip → shaped for beakers.

8. Crucible Tongs

Function: holds hot crucibles
Memory trick: (The front part looks like a snake eater)
Sharper ends → for tiny, VERY hot items.

9. Spot Plate

Function: small chemical reactions in tiny wells
Memory trick:
Egg carton for chemicals.

10. Rubber Stopper

Function: seals test tubes/flasks
Memory trick:
Rubber = plug.

11. Electronic Balance

Function: measures mass
Memory trick:
Digital = precise.

12. Triple Beam Balance

Function: measures mass manually
Memory trick:
Three beams = triple accuracy.

13. Watch Glass

Function: weigh solids or cover beakers
Memory trick:
Looks like a contact lens.

14. Funnel

Function: helps pour liquids
Memory trick:
Triangle → guides liquid.

15. Erlenmeyer Flask

Function: heating, swirling liquids
Memory trick:
Triangle shape = no spills when swirling.

16. Scoopula

Function: transfers solids
Memory trick:
Scoop = scoop.

17. Hot Plate

Function: heats substances
Memory trick:
Electric stove for labs

18. Bunsen Burner

Function: heats substances with flame
Memory trick:
Blue flame = hottest.

19. Evaporating Dish

Function: evaporates liquids
Memory trick:
Shallow dish = more surface area.

20. Overflow Can

Function: measures volume of irregular solids
Memory trick:
Object goes in → water spills out → measure it.

HHPS SYMBOLS (HOUSEHOLD HAZARDOUS PRODUCT SYMBOLS)

1. Explosive

Meaning: container can explode if heated or punctured
Examples: aerosol cans, hairspray
Memory trick: looks like a bomb exploding.

2. Flammable

Meaning: product can catch fire easily
Examples: gasoline, BBQ starter
Memory trick: flame = fire hazard.

3. Corrosive

Meaning: burns skin, eyes, clothing, metal
Examples: drain cleaner, oven cleaner
Memory trick: liquid eating through a hand + metal.

4. Poisonous

Meaning: can cause serious harm or death if swallowed
Examples: antifreeze, rat poison
Memory trick: skull + crossbones = danger.

A. Exploding Bomb

Meaning: explosive or highly reactive
Memory trick: looks like a bomb blowing up.

B. Flame

Meaning: flammable
Memory trick: same as HHPS but more professional.

C. Flame Over Circle

Meaning: oxidizer (helps fire burn stronger)
Memory trick: circle = oxygen → fuels fire.

D. Gas Cylinder

Meaning: compressed gas
Memory trick: looks like a scuba tank.

E. Corrosion

Meaning: burns skin, eyes, metal
Memory trick: liquid eating through a hand + metal.

F. Skull and Crossbones

Meaning: toxic, fatal in small amounts
Memory trick: pirate symbol = deadly.

G. Health Hazard

Meaning: long‑term health effects (cancer, organ damage)
Memory trick: person with starburst in chest.

H. Exclamation Mark

Meaning: irritant, harmful
Memory trick: “!” = warning.

I. Biohazard

Meaning: infectious materials (viruses, bacteria)
Memory trick: the classic biohazard logo.

J. Environment

Meaning: harmful to aquatic life
Memory trick: dead fish + tree.