Lab Tools and Instruments

Question 1

Beaker

Answer 1

• glass cup with a spout at the top
• lines on the sides are most likely in ml
• inaccurate

Question 2

Erlenmeyer Flask

Answer 2

• looks like a beaker but is narrower at the top
• measurements approximated to the nearest millimeter
• easy to place stoppers

Question 3

Volumetric Flasks

Answer 3

• rounded at the bottom
• long skinny neck
• used for medium level precision
• only one mark for a specific volume

Question 4

Stoppers

Answer 4

-rubber tops that fit on the top of flasks or test tubes

Question 5

Test Tubes

Answer 5

-a rounded glass tube

Question 6

Test Tube Brushes

Answer 6

-cleans test tubes

Question 7

Funnels

Answer 7

• cone-shaped
• has a stem
• transfers solutions/liquids between separate containers

Question 8

Filter Paper

Answer 8

• used for filtering out solids/precipitates
• must be folded properly
• very thin

Question 9

Graduated Cylinders

Answer 9

• fairly accurate to 0.1
• measures liquids
• reads from the bottom of the meniscus

Question 10

Pipettes

Answer 10

• long thin tube with suction attached

- draws up correct amount of liquid

Question 11

Burette and Stand

Answer 11

• long thin pipe with a valve and stopcock
• held by a ring stand
• precise calculations, accurate to 0.01

Question 12

Bunsen Burners

Answer 12

• used to heat things
• open flame fed by a gas line
• controlled by turning a valve

Question 13

Ring Stands

Answer 13

• circle of metal attached to a stand that can hold breakers or flasks
• beakers and flasks are supported by wire gauze/clay triangle

Question 14

Hot Plates

Answer 14

• heats things
• no open flame
• controlled by a dial

Question 15

Electronic Balances

Answer 15

-measures the mass of a substance

Question 16

Double Pan Balances

Answer 16

• compares the weight of two different objects

- you must know at least one mass of the two substances

Question 17

Weighing Boats/Papers

Answer 17

• used to hold the substance being weighed

- subtract the mass of the boat first

Question 18

Spatulas/Scoopulas

Answer 18

• metal or plastic

- transfer solid substances from one container to another

Question 19

Mortar and Pestle

Answer 19

• grinds larger pieces into powder
• mortar is a bowl
• pestle is the grinding tool

Question 20

Thermometers

Answer 20

-measures temperature

Question 21

A beaker is used to…

Answer 21

mix, heat, or hold substances

Question 22

Burettes are often used for _____

Answer 22

titrations (with an Erlenmeyer flask)

Question 23

Meniscus

Answer 23

The concave curve at a liquid’s surface (you measure from here while using a graduated cylinder).

Question 24

A meniscus is created because….

Answer 24

the liquid’s particles are attracted to the walls of a container.

Question 25

Test tubes are usually held upright using….

Answer 25

clamps or test tube holders

Question 26

Triple Beam Balance

Answer 26

-measures the mass of an object based on a comparison to predetermined masses (predetermined masses are called riders)

Question 27

Analytical Balance

Answer 27

• single pan

- measures with great accuracy and precision

Question 28

Manometer

Answer 28

• measures the pressure of a fluid

- measures pressure based on differences in the height and position of a column of liquid in a “U” shaped tube.

Question 29

Manometers often measure pressure close to _____ pressure

Answer 29

atmospheric

Question 30

What is Po and Pa in reference to a manometer?

Answer 30

Po= reference pressure (open to atmosphere)

Pa=testing pressure

Question 31

Barometer

Answer 31

• a type of manometer used to measure atmospheric pressure
• when water/mercury rises, the pressure is increasing
• when water/mercury falls, the pressure is decreasing
• commonly used in weather reporting