Prelim

Question 1

It is a measurement science consisting of a set of
powerful ideas and methods that are useful in all
fields of science and medicine.

Answer 1

ANALYTICAL CHEMISTRY

Question 2

“Analytical Chemistry, or the art of recognizing
different substances and determining their
constituents, takes a prominent position among
the applications of science…”

Answer 2

Friedrich Wilhelm Ostwald

Question 3

are determined in millions of
blood samples every day and used to
diagnose and treat illnesses

Answer 3

concentration of Oxygen and Carbon
Dioxide

Question 4

present in
automobiles are measured to determine
the effectiveness of smog-control
devices.

Answer 4

quantities of Hydrocarbons, Nitrogen
Oxides, and Carbon Monoxide

Question 5

in blood serum help diagnose
parathyroid disease in humans

Answer 5

quantitative measurements of ionized
Calcium

Question 6

indicates the amount of
each substance in a sample

Answer 6

Quantitative analysis

Question 7

It determines the relative amounts of analytes in
numerical terms

Answer 7

Quantitative Analysis

Question 8

reveals the identity of the
elements and compounds in a sample

Answer 8

Qualitative Analysis

Question 9

It establishes the chemical identity of the
species in the sample

Answer 9

Qualitative analysis

Question 10

Quantitative analysis mentions the analyses in which the amount or concentration of an analyte may be expressed and determined (estimated)
as the numerical value in the given

Answer 10

appropriate units

Question 11

Qualitative analysis is when the substance is classified or identified based on

Answer 11

physical or chemical properties like solubility, chemical reactivity, molecular weight, melting point, mass spectra, etc.

Question 12

determine the mass of the analyte or some compound
chemically related to it.

Answer 12

Gravimetric methods

Question 13

determines the
volume of a solution containing sufficient
reagent to react completely with the
analyte.

Answer 13

Volumetric method

Question 14

involve the
measurement of such electrical
properties as voltage, current, resistance,
and quantity of electrical charge

Answer 14

Electroanalytical methods

Question 15

are based on
measurement of the interaction between
electromagnetic radiation and analyte
atoms or molecules or on the production
of such radiation by analytes

Answer 15

Spectroscopic methods

Question 16

Flow Diagram Steps ode Quantitative analysis

Answer 16

Select method
Acquire sample
Process sample
Eliminate Interferences
Measure Property X
Calculate Results
Estimate reliability of results

Question 17

A solid sample is ground, mixed to ensure
homogeneity, and stored for various lengths of
time before analysis begins. Because _______ changes the chemical composition of
solids, it is a good idea to dry samples just before
starting an analysis.

Answer 17

any loss or gain of water

Question 18

a species that causes an error
in an analysis by enhancing or attenuating (making
smaller) the quantity being measured.

Answer 18

interference

Question 19

All analytical results depend on a final
measurement X of a physical or chemical property
of the analyte.
• Ideally, the measurement of the property is
directly proportional to the concentration.

Answer 19

Calibration and Measurement

Question 20

It is an integral role for chemical analysis.

Answer 20

FEEDBACK CONTROL SYSTEMS

Question 21

The process of continuous measurement and
control is often referred to as a

Answer 21

feedback system

Question 22

and the cycle of measurement, comparison, and
control is called a

Answer 22

feedback loop

Question 23

Scientists throughout the world are adopting a
standardized system of units known as the

Answer 23

International System of Units (SI)

Question 24

of a substance is the mass in
grams of one mole of the substance.

Answer 24

molar mass (M)

Question 25

calculated by summing the
atomic masses of all the elements appearing in a
chemical formula.

Answer 25

Molar masses