BIO LAB 2

Question 1

Known for having very low coefficients of thermal expansion making them more resistant to thermal shock than any other common glass

Answer 1

Borosilicate

glass

Question 2

A glass consisting of almost pure silica in

amorphous (non-crystalline) form

Answer 2

Fused quartz

Question 3

Can block
ultraviolet
and infrared
radiation

Answer 3

Amber glass

Question 4

Can
withstand
pressurized
applications

Answer 4

Heavy-wall

glass

Question 5

Finely
porous glass
through
which gas or
liquid may
pass

Answer 5

Fritted glass

Question 6

Specially
treated to
reduce the
occurrence
of breakage
or failure

Answer 6

Coated

glassware

Question 7

Specially
treated to
prevent
organic
samples
from sticking
to the glass

Answer 7

Silanized

glassware

Question 8

these are the workhorse glassware of any

chemistry lab

Answer 8

Beakers

Question 9

They come in a variety of sizes and are used for

measuring volumes of liquid

Answer 9

Beakers

Question 10

aren’t particularly precise

Answer 10

Beakers

Question 11

are often used for mixing and transferring

liquids

Answer 11

Beakers

Question 12

This type of flask has a narrow neck and a flat

bottom

Answer 12

ERLENMEYER FLASK

Question 13

It’s good for swirling, storing, and heating liquids

Answer 13

ERLENMEYER FLASK

Question 14

are used to prepare solutions

Answer 14

VOLUMETRIC FLASK

Question 15

Each features a narrow neck with a marking,

usually for a single precise volume

Answer 15

VOLUMETRIC FLASK

Question 16

Because temperature changes cause materials,
including glass, to expand or shrink, volumetric
flasks aren’t meant for ___

Answer 16

heating

Question 17

These flasks can be stoppered or sealed so that
evaporation won’t change the concentration of a
stored solution

Answer 17

VOLUMETRIC FLASK

Question 18

These are good for collecting and holding
small samples

They aren’t typically used for measuring precise
volumes

Answer 18

TEST TUBES

Question 19

relatively inexpensive compared

with other types of glassware

Answer 19

TEST TUBES

Question 20

Those meant to be heated directly with a flame
are sometimes made from borosilicate glass, but
others are made from less sturdy glass and
sometimes plastic

Answer 20

TEST TUBES

Question 21

These are used to dispense exact quantities of

liquid into another vessel

Answer 21

BURETTE

Question 22

Graduated glass tube with a tap at one end, for
delivering known volumes of a liquid, especially in
titrations

Answer 22

BURETTE

Question 23

Also known as measuring cylinder or mixing

cylinder

Answer 23

GRADUATED CYLINDER

Question 24

a common piece of laboratory

equipment used to measure the volume of a liquid

Answer 24

GRADUATED CYLINDER

Question 25

Small bottles used to store samples or reagents

Answer 25

VIALS

Question 26

Used to mix solvents and samples together

Answer 26

STIRRING ROD

Question 27

pipet holds or contains a particular volume but does not dispense that exact volume

Answer 27

TC

Question 28

pipet will dispense that exact | volume indicated

Answer 28

TD

Question 29

``` has continuous etched ring or two small, close continuous rings located near the top of the pipet which means that the last drop of liquid should be expelled into the receiving vessel ```

Answer 29

A blowout pipet

Question 30

Without these markings,

Answer 30

a pipet is self - draining, and content of pipet drain by gravity