lab safety

Question 1

Beaker

Answer 1

Holds solids or liquids that will not release gases when reacted or are unlikely to splatter if stirred or heated.

Question 2

Erlenmeyer flask

Answer 2

Holds solid liquids that may release gases during a reaction or that are likely to splatter if stirred or heated.

Question 3

Florence flask.

Answer 3

Rarely used for us, used for mixing chemicals, a narrow neck prevents splash explosions.

Question 4

graduated cylinder

Answer 4

Used to measure volumes of liquids.

Question 5

gas collecting bottle

Answer 5

Used for when large volumes of gases are produced and must be collected by the displacement of water.

Question 6

Test tube holder

Answer 6

Holding a test tube that is too hot to handle.

Question 7

test tube brushes

Answer 7

used to clean test tubes and graduated cylinders.

Question 8

test tube racks.

Answer 8

for holding and organizing test tubes on the laboratory counter. Plastic racks may melt in contact with very hot test tubes.

Question 9

rubber stoppers.

Answer 9

Used to close containers to avoid spillage or contamination. Containers with a stopper on them should never be heated.

Question 10

Spot Plates.

Answer 10

Used when we want to perform many small-scale reactions at one time.

Question 11

Watch glass

Answer 11

Used to hold a small amount of solid, such as the product of a reaction.

Question 12

Glass stir rod

Answer 12

Used to manually stir solutions. Also be used to transfer a single drop of a solution.

Question 13

Medicine dropper

Answer 13

Used to transfer a small volume of liquid. Less than one mL.

Question 14

Litmus paper

Answer 14

Paper sheets to identify Ph-level. Red for bases and blue for acids.

Question 15

Forceps

Answer 15

used to pick up small objects.

Question 16

Funnel

Answer 16

Used to aid in the transfer of liquid from one vessel to another.

Question 17

Mohr pipet

Answer 17

Measures and delivers exact volumes of liquids

Question 18

Wash bottle

Answer 18

Has a spout that delivers a wash solution to a specific area. Only distilled water should be put in it.

Question 19

Weighing boat

Answer 19

Used to weigh solids that will be transferred to another vessel.

Question 20

spatulas

Answer 20

Used to dispense solid chemicals from their containers.

Question 21

Beaker Tongs

Answer 21

Used to move beakers containing hot liquids

Question 22

Bunsen burner

Answer 22

Used for the heating of liquids and nonvolatile solids.

Question 23

Evaporating dish

Answer 23

Used for the heating of stable solid compounds and elements.

Question 24

crucible

Answer 24

Used for heating certain solids, mainly metals, to very high temperatures.

Question 25

clay triangle

Answer 25

Used as a support for porcelain crucibles when being heated over a bunsen burner.

Question 26

crucible tongs

Answer 26

for handling hot crucibles. Not to be used for picking up beakers.

Question 27

Glass plates

Answer 27

Provide a surface for semi-micro scale experiments, such as drop reaction and testing of acids and bases.

Question 28

ringstand

Answer 28

Provide a safe and convenient way to perform reaction that require heating using a bunsen burner.

Question 29

iron rings

Answer 29

connect to a ringstand to provide a stable, elevated platform for the reaction.

Question 30

utility clamps

Answer 30

used to secure test tubed, distillation columns, and burets to the ringstand.

Question 31

double buret clamps

Answer 31

double buret clamps are used to burets- long graduated tubes used in titration.

Question 32

Wire Gauze

Answer 32

Sits on the iron ring to provide a place to place a beaker.

Question 33

strikers

Answer 33

Used in light bunsen burners.