CALCULATIONS USED IN ANALYTICAL CHEMISTRY

Question 1

IMPORTANT UNITS OF MEASUREMENT

Answer 1

SI Units of Measurement, Mass and Weight, Mole and Millimole

Question 2

A standardized system of units that is based
on the seven fundamental base units

Answer 2

International System of Units (SI)

Question 3

SI Base Unit: Mass

Answer 3

Kilogram

Question 4

SI Base Unit:Length

Answer 4

Meter (m)

Question 5

SI Base Unit:Time

Answer 5

Second (s)

Question 6

SI Base Unit: Temperature

Answer 6

Kelvin (K)

Question 7

SI Base Unit: Amount of
substance

Answer 7

Mole (mol)

Question 8

SI Base Unit: Electric
current

Answer 8

Ampere (A)

Question 9

SI Base Unit: Luminous
intensity

Answer 9

candela (cd)

Question 10

Used to express small or large measured quantities
in terms of a few simple digits

Answer 10

PREFIXES

Question 11

Wavelength yellow light

Answer 11

= 5.9 x 10-7 or 590 nm
(nanometers)

Question 12

Volume of a liquid injected onto a chromatographic
column =

Answer 12

roughly 50 x 10-6 L, or 50 μL (microliters)

Question 13

The amount of memory on some computer hard disks
is

Answer 13

around 20 x 109bytes, or 20 Gbytes (gigabytes)

Question 14

In analytical chemistry, we often determine the
amount of ?

Answer 14

chemical species

Question 15

Laboratory Reference Ranges in Healthy Adults:
Ammonia:

Answer 15

15-50 μmol/L

Question 16

Laboratory Reference Ranges in Healthy Adults: Chloride:

Answer 16

95-105 mmol/L

Question 17

Laboratory Reference Ranges in Healthy Adults: Copper:

Answer 17

70-150 μg/dL

Question 18

Laboratory Reference Ranges in Healthy Adults: Creatinine:

Answer 18

0.8-1.3 mg/dL

Question 19

Laboratory Reference Ranges in Healthy Adults: Ferritin:

Answer 19

12-300 ng/mL (men), 12-150 ng/mL
(women)

Question 20

Laboratory Reference Ranges in Healthy Adults: Glucose:

Answer 20

65-110 mg/dL

Question 21

Laboratory Reference Ranges in Healthy Adults: Ceruloplasmin:

Answer 21

15-50 mg/dL

Question 22

an invariant measure of the quantity of matter
in an object

Answer 22

Mass

Question 23

– the force of attraction between an object and
its surroundings, principally the earth

Answer 23

Weight

Question 24

is the SI unit for the amount of a chemical
substance

Answer 24

Mole (mol)

Question 25

Expressed as the number of entities such as atoms,
molecules, ions, electrons or other particles given by
the Avogadro’s number (6.02x10^23)

Answer 25

Mole (mol)

Question 26

Millimole =

Answer 26

1/1000 of a mole

Question 27

millimolar mass (mM) =

Answer 27

1/1000 of the molar mass.

Question 28

1 mole =

Answer 28

1000 millimoles

Question 29

is the quantitative relationship among
the amounts of reacting chemical species.

Answer 29

Stoichiometry

Question 30

It gives us how much mass of each of the
reactants is needed in a given chemical reaction,
and the number of product/s formed.

Answer 30

Stoichiometry

Question 31

Apparently, stoichiometry involves working in a
__________ equation.

Answer 31

balanced

Question 32

gives the simplest whole
number ratio of atoms in a chemical compound.

Answer 32

EMPIRICAL FORMULA

Question 33

specifies the number of
atoms in a molecule.

Answer 33

MOLECULAR FORMULA

Question 34

is a visual representation
that shows how atoms are arranged and bonded
together in a chemical compound.

Answer 34

is a visual representation
that shows how atoms are arranged and bonded
together in a chemical compound.

Question 35

A balanced chemical equation follows the principle
of ______________________ – “Matter is neither
created nor destroyed.”

Answer 35

Law of Mass Conservation

Question 36

Four fundamental ways of expressing solution
concentration:

Answer 36

 Molar/Analytical concentration
 Percent concentration
 Solution-diluent volume ratio
 P-functions

Question 37

is the number of moles that
species that is contained in 1 liter of the solution (not
1L of solvent).

Answer 37

MOLAR CONCENTRATION OF A SOLUTION OF A
SOLUTE SPEXIES X

Question 38

gives the total number of moles of a
solute in 1 liter of the solution (or the total number of
millimoles in 1 mL).

Answer 38

MOLAR ANALYTICAL CONCENTRATION OF A
SOLUTION

Question 39

refers to the
molar concentration of a particular species in a
solution at equilibrium

Answer 39

MOLAR EQUILIBRIUM CONCENTRATION OR
EQUILIBRIUM CONCENTRATION

Question 40

PERCENT CONCENTRATION OF THE SOLUTION
is also expressed as parts per hundred. This can be
expressed in three ways:

Answer 40

weight precent (w/w), volume percent (v/v), weight/volume percent (w/v)

Question 41

ppm formula

Answer 41

(mass of solute/mass of solution) x 10^6 ppm

Question 42

ppb formula

Answer 42

(mass of solute/mass of solution) x 10^9 ppb

Question 43

ppt formula

Answer 43

(mass of solute/mass of solution) x 10^3

Question 44

The composition of a dilute solution is specified
in terms of the volume of a more concentrated
solution and the volume of solvent used in
diluting it.

Answer 44

SOLUTION-DILUENT VOLUME RATIOS

Question 45

The p-value is the negative algorithm of the molar
the concentration of the species X. Formula?

Answer 45

pX= -log [X]

Question 46

The density of a substance is its

Answer 46

mass per volume
(kg/L or g/mL).

Question 47

d = mass/volume

Answer 47

density

Question 48

sp.gr. = density of substance
density of water

Answer 48

specific gravity