Test 1

Question 1

Beaker

Answer 1

Beakers hold solids or
liquids that will not
release gases when
reacted or are likely
to splatter if stirred or
heated.

Question 2

Erlenmeyer Flask

Answer 2

Erlenmeyer flasks hold
solids or liquids that may
release gases during a
reaction or that are
likely to splatter if
stirred or heated.

Question 3

Graduated Cylinder

Answer 3

A graduated
cylinder is used to
measure volumes of
liquids.

Question 4

Test Tubes

Answer 4

Hold small amount of substances

• 13 X 100 mm
• 10 X 75 mm

Question 5

Test Tube Holder

Answer 5

A test tube holder is
useful for holding a
test tube which is
too hot to handle.

Question 6

Test Tube Brushes

Answer 6

Test tube brushes are
used to clean test tubes
and graduated cylinders.
Forcing a large brush into
a small test tube will
often break the tube.

Question 7

Test Tube Racks

Answer 7

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

Question 8

Rubber Stoppers

Answer 8

Rubber stoppers are used
to close containers to avoid
spillage or contamination.
Containers should never be
heated when there is a
stopper in place.

Question 9

Spot Plates

Answer 9

Spot plates are used when
we want to perform many
small scale reactions at
one time.

Question 10

Watch Glass

Answer 10

watch glass is used to
hold a small amount of
solid, such as the
product of a reaction.

Question 11

Glass Stirring Rod

Answer 11

A glass stirring rod is
used to manually stir
solutions. Careful these
can break easily if
dropped (even into the
sink).

Question 12

Medicine Dropper

Answer 12

A medicine dropper is
used to transfer a
small volume of liquid
(less than one mL).

On top of each medicine dropper is a “rubber bulb”

Question 13

Litmus Paper

Answer 13

Red litmus to identify bases

Blue litmus to identify acids

Question 14

Forceps

Answer 14

Forceps (or tweezers) are used to pick up small

objects.

Question 15

Funnel

Answer 15

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

Question 16

Pipette with Bulb

Answer 16

A pipette measures
and delivers exact
volumes of liquids.
To draw a liquid
into a pipette a
bulb is used

Question 17

Wash Bottle

Answer 17

A wash bottle has a
spout that delivers a
wash solution to a
specific area. Distilled
water is the only liquid
that should be used in a
wash bottle.

Question 18

Weighting Boat

Answer 18

Weighing boats are used to
weigh solids that will be
transferred to another
vessel.

Question 19

Scoopulas

Answer 19

dispense solid chemicals
from their containers.
Chemicals should never
be transferred with
your bare hands.

Question 20

Beaker Tongs

Answer 20

Beaker tongs are
used to move beakers
containing hot liquids

Question 21

Bunsen Burner

Answer 21

Bunsen burners are used
for the heating of
nonvolatile liquids and
solids.

Question 22

Flint Lighters

Answer 22

Flint lighters are used to
light Bunsen burners.
The flint that is used are
expensive. Do not operate
the flint lighter
repeatedly just to see the
sparks!

Question 23

Evaporating Dish

Answer 23

The evaporating dish is
used for the heating of
stable solid compounds
and elements.

Question 24

Crucible

Answer 24

Crucibles are used for
heating certain solids,
particularly metals, to
very high temperatures.

Question 25

Clay Triangle

Answer 25

``` The clay triangle is used as a support for porcelein crucibles when being heated over a Bunsen burner ```

Question 26

Crucible Tongs

Answer 26

For handling hot crucibles: also used to pick up other hot objects. NOT to be used for picking up beakers

Question 27

Ringstands and their Components

Answer 27

Ringstands are a safe and convenient way to perform reactions that require heating using a Bunsen burner.

Question 28

Ringstands: Iron RIng

Answer 28

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

Question 29

Ringstands: Utility Clamps

Answer 29

Utility clamps are used to secure test tubes and other equipment to the ringstand.

Question 30

Ringstands: Double Buret Clamps

Answer 30

Used to hold two burets simultaneously in titration

Question 31

Ringstands: Wire Gauze

Answer 31

Sits on the iron ring to provide a better place to stand a beaker. On older wire gauze, the white material is asbestos (heat resistant material)

Question 32

Measuring

Answer 32

- Volume - Temperature - Mass

Question 33

Reading the Meniscus

Answer 33

``` Always read volume from the bottom of the meniscus. The meniscus is the curved surface of a liquid in a narrow cylindrical container. ```

Question 34

Parallax Errors

Answer 34

errors arise when a meniscus or needle is viewed from an angle rather than from straight-on at eye level.

Question 35

Measuring Volume

Answer 35

" Determine the volume contained in a graduated cylinder by reading the bottom of the meniscus at eye level. " Read the volume using all certain digits and one uncertain digit. " Certain digits are determined from the calibration marks on the cylinder. "The uncertain digit (the last digit of the reading) is estimated.

Question 36

Thermometer

Answer 36

``` Determine the temperature by reading the scale on the thermometer at eye level. ``` o You should be to take a reading that is accurate to at least 1 decimal place.

Question 37

Rules for Thermometer

Answer 37

``` If the thermometer bulb touches the flask, the temperature of the glass will be measured instead of the temperature of the solution. Readings may be incorrect, particularly if the flask is on a hotplate or in an ice bath. ```

Question 38

Balance Rules

Answer 38

- Always check the balance is leveled and zero before using it - Write down all numbers that are shown on the balance - Never weigh directly on the balance pan. Always use the weighing boat - Do not weigh hot or cold objects - Clean up any spills around the balance immediately - Turn off the balance when you are done