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

What is the purpose of wearing safety goggles in a lab?

They protect eyes from chemicals, heat, and broken glass.

Why is eating, drinking, or chewing gum prohibited in the lab?

Chemicals can spill and contaminate food or beverages.

What should you do with long hair and loose clothing in the lab?

Tie back long hair and secure loose clothing to prevent accidents.

What behavior is prohibited in the lab aside from eating and drinking?

Running, playing, or fooling around.

Why must you never touch equipment or chemicals without permission?

Some chemicals can burn skin or cause other injuries.

What should you do if an accident occurs in the lab?

Report all accidents immediately.

What is the function of a beaker?

It is used to hold, mix, or heat liquids, but not for accurate measuring.

What equipment is used for accurate measurement of liquid volume?

Graduated cylinder.

What is the purpose of a test tube?

It is used to hold small amounts of substances, usually liquids.

How does a test tube holder function?

It holds a hot test tube or one being heated.

What is the primary function of a test tube rack?

It holds test tubes upright.

What is a test tube brush used for?

To clean test tubes.

What do beaker tongs do?

They hold hot beakers.

What are crucible tongs designed to hold?

Hot crucibles.

What is the use of a spot plate?

It is used for small chemical reactions in tiny wells.

What does a rubber stopper do?

Seals test tubes or flasks.

What equipment measures mass digitally?

Electronic balance.

What is a triple beam balance used for?

To measure mass manually.

What can watch glass be used for?

To weigh solids or cover beakers.

What is the function of a funnel?

Helps pour liquids.

Why is an Erlenmeyer flask useful?

For heating and swirling liquids without spills.

What is the purpose of a scoopula?

To transfer solids.

How does a hot plate function in the lab?

It heats substances.

What is a Bunsen burner used for?

To heat substances with flame.

What does an evaporating dish do?

It evaporates liquids.

What is the purpose of an overflow can?

To measure the volume of irregular solids.

What does the explosive symbol indicate?

The container can explode if heated or punctured.

What does the flammable symbol mean?

The product can catch fire easily.

What does the corrosive symbol imply?

It burns skin, eyes, clothing, and metal.

What does the poisonous symbol indicate?

Can cause serious harm or death if swallowed.

What does the exploding bomb symbol represent?

It indicates a substance that is explosive or highly reactive.

What does the flame symbol represent?

It indicates flammable materials.

What does the flame over circle symbol signify?

It indicates an oxidizer that helps fires burn stronger.

What does the gas cylinder symbol represent?

It indicates compressed gas.

What does the corrosion symbol indicate?

It burns skin, eyes, and metal.

What does the skull and crossbones symbol mean?

It indicates toxic materials

that are fatal in small amounts.

What does the health hazard symbol indicate?

Possible long-term health effects such as cancer or organ damage.

What does the exclamation mark symbol mean?

It indicates an irritant or harmful material.

What does the biohazard symbol signify?

It indicates infectious materials, such as viruses and bacteria.

What does the environment symbol indicate?

It indicates a substance that is harmful to aquatic life.