Lab Equipment/Classification of Matter

True

(t/f) All unauthorized experiments are prohibited.

False

(t/f) Chipped or cracked glassware is okay to use.

True

(t/f) Hot glass looks the same as cold glass.

False

(t/f) It's okay to pick up broken glass with your bare hands as long as the glass is placed in the trash.

True

(t/f) Laboratory aprons should be worn during all lab activities.

True

(t/f) Never leave a lit burner unattended

True

(t/f) Never remove chemicals or other equipment from the laboratory.

False

(t/f) Pipets are used to measure and dispense small amounts of liquids. You should draw the liquid into the pipet using your mouth.

True

(t/f) Read all procedures thoroughly before entering the laboratory.

False

(t/f) Return all unused chemicals to their original containers.

False

(t/f) This piece of lab equipment has marking up and down the length of the container and is used to accurately measure the volume of liquids.

True

(t/f) Work areas should be kept clean and tidy

False

(t/f) You are allowed to enter the chemical preparation/storage area any time you need to get an item.

True

(t/f)All chemicals in the lab are to be considered dangerous.

Beaker

A common container in most labs, the piece of equipment has a spout on its rim to help avoid spillage and is used for stirring, mixing, and heating chemicals.

Test Tube

A glass tube with one open end and one closed end used to hold small samples.

disposed of according to your instructor's directions

After completing an experiment, all chemical wastes should be

Any time chemicals, heat or glassware are used

Approved eye protection devices (such as goggles) are worn in the laboratory

An open flame

Flammable materials, like alcohol, should never be dispensed or used near

discuss the issue with your instructor

If a lab experiment is not completed, you should

Notify your instructor

If a laboratory fire erupts, immediately

The science instructor

If a piece of equipment is not working properly, stop, turn it off, and tell

plenty of water

If an acid is splashed on your skin, wash at once with

Ask the instructor before proceeding

If you do not understand a direction or part of a lab procedure, you should

Loose clothing, sandals, dangling jewelry

In a laboratory, the following should not be worn.

tied back or kept entirely out of the way with a hair band, hairpins, or other confining device.

Long hair in the laboratory must be

Density

Mass per unit volume

physical property

One ounce of gold can be drawn out into 50 miles of thin gold wire

physical property

The boiling point of ethanol is 78.4°C

Closed toed shoes

The following footwear is best in the laboratory

physical property

The solubility of CaCl2 in 100 g of water at 20°C is 74.5 g

Erlenmeyer flask

This piece of glassware has a narrow neck with the width expanding as you go toward the base. The narrow neck allows the user of this equipment to swirl liquids w/ out much risk of spillage and to use a glass or rubber stopper.

Hot plate

This piece of lab equipment can be used instead of a Bunsen burner to heat materials inside glassware.

Beaker tongs

This piece of lab equipment has a wide circular opening that is normally covered in rubber and is used to move beakers that are too hot to move by hand.

Clay triangle

This piece of lab equipment has an open center and is used to hold and heat crucibles.

Graduated cylinder

This piece of lab equipment has marking up and down the length of the container and is used to accurately measure the volume of liquids.

Bunsen burner

This piece of lab equipment is a mechanical apparatus used as a heat source. It is made of metal and is connected to a flammable gas source.

Iron ring

This piece of lab equipment is a metal ring that is normally attached to a ring stand. It is used a sort of "shelf" for glassware, crucibles, etc.

Crucible

This piece of lab equipment is a small, clay cup and lid used to heat substances to extremely high temperatures.

Wire mesh

This piece of lab equipment is generally laid across an iron ring that is attached to a ring stand and used to evenly distribute heat to the piece of glassware resting on it.

Funnel

This piece of lab equipment is made from plastic or glass, has a short or long stem, and is used to assist in the transfer of liquids without spillage from the original container to a new container with a small opening.

Watch glass

This piece of lab equipment is round, made of glass, and concave up. It can hold a small amount of liquid and can be used for evaporation purposes or as a lib for a beaker.

Stir rod

This piece of lab equipment is typically made of glass and is used to stir or mix chemicals.

Scoopula

This piece of lab equipment is used for scooping solid materials or removing filter paper from Buchner funnels.

Electronic balance

This piece of lab equipment is used to electronically find the mass of chemicals.

Test tube tongs

This piece of lab equipment is used to hold or transport test tubes that are too hot to be held or transported by hand.

Striker

This piece of lab equipment is used to light a Bunsen burner though creating sparks by rubbing flint on a rough surface.

Thermometer

This piece of lab equipment is used to measure the temperature of liquids.

forceps

This piece of lab equipment is used to safely grab small things like chunks of solid chemicals.

Rubber stopper

This piece of lab equipment is used to seal narrow mouth containers such as flasks and test tubes.

Droppers

This piece of lab equipment is used to suck up small amounts of liquid and then squeeze it out in small drops.

Ring stand

This piece of lab equipment is used to suspend burets, beakers, flasks, and crucibles over other container or a heat source such as a Bunsen burner.

Buret Clamp

This piece of lab equipment is used to vertically mount burets to a ring stand, often times for a titration experiment.

safety goggles

This piece of lab equipment must be worn at all times and is used to protect your eyes from harmful chemicals.

wash your hands thoroughly with soap and water

When you finish working with chemicals, biological specimens, and other lab substances, always

chemical property

White phosphorus is extremely pyrophoric

Use tongs

You are heating a piece of glass and now want to pick it up. You should

Away from all people

You are heating a substance in a test tube. Always point the open end of the tube

tell the science instructor at once

You have been injured in the laboratory (cut, burn, etc.). First you should

Twisting the tubing and stopper carefully, lubricating the tubing with water or glycerin, using a towel or cotton gloves for protection.

You want to place a piece of glass tubing into a rubber stopper after the tubing has been fire polished and cooled. This is best done by

beach sand

heterogeneous mixture

chex mix

heterogeneous mixture

always against the rule

horseplay or practical jokes in the laboratory are

pyrophoric

ignite spontaneously in air at relatively low temperatures.

Chemical

properties describe how a substances chemical composition will change given a specific set of conditions.

ACETYLENE

pure substance, compound

baking soda

pure substance, compound

sulfuric acid

pure substance, compound

aluminum

pure substance, element

magnesium

pure substance, element

nitrogen

pure substance, element

When gathering glassware and equipment for an experiment, you should

read all directions carefully to know what equipment is necessary, examine all glassware to check for chips or cracks, clean any glassware that appears dirty.

tell the teacher

when in doubt