Lesson 1

Question 1

all of the components in the sample containing an analyte.

Answer 1

matrix
sample matrix

Question 2

portions of a material of approximately the same size that are carried through an analytical procedure at the same time and in the same way.

improves the quality of the results and provides a measure of their reliability.

Answer 2

Replicates
Replicate Samples

Question 3

various statistical tests are performed on the results to establish their reliability.

Answer 3

Quantitative Measurement

Question 4

Preparing Solutions for?

Answer 4

Physical and Chemical Changes

Question 5

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

Answer 5

Interference

Question 6

Liquid samples are subject to

Answer 6

solvent evaporation

Question 7

to prevent contamination by atmospheric gases.

Answer 7

sealed container

Question 8

One of the first questions to be considered in the selection process is

Answer 8

level of accuracy required

Question 9

involves obtaining a small mass of a material

Answer 9

Sampling

Question 10

most difficult step in an analysis and the source of greatest error

Answer 10

Sampling

Question 11

constituent parts can be distinguished visually or with the aid of a microscope.

Answer 11

heterogeneous

Question 12

the process of determining how much of a given sample is the material indicated by its name

Answer 12

assay

Question 13

We ________ samples and we _______ __________ .

Answer 13

analyze, determined substances

Question 14

One is the ____ or the _________________ to be analyzed.

Answer 14

mass, volume of sample

Question 15

second is the measurement of some quantity that is proportional to the amount of analyte in the sample, such as

Answer 15

mass, volume, intensity of light, or electrical charge.

Question 16

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

Answer 16

Gravimetric method

Question 17

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

Answer 17

Electroanalytical method

Question 18

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

Answer 18

Volumetric Method

Question 19

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

Answer 19

Spectroscopic methods

Question 20

Miscellaneous methods:

Answer 20

mass-to-charge ratio
rate of radioactive decay
heat of reaction
rate of reaction
sample thermal conductivity

optical activity

• refractive index.

Question 21

dominated by sophisticated instrumentation

Answer 21

MODERN INSTRUMENTATION

Question 22

tend to form the backbone of most undergraduate

Answer 22

Analytical Chemistry

Question 23

The presence of copper

Answer 23

Bluish-Green

Question 24

Presence of Sodium

Answer 24

Yellow Color Flame

Question 25

study of the separation, identification, and quantification of the chemical components of natural and artificial materials.

Answer 25

Analytical Chemistry

Question 26

gives an indication of the identity of the chemical species in the sample, and quantitative analysis determines the amount of certain components in the substance.

Answer 26

Qualitative Analysis

Question 27

achieved by measurement of weight or volume.. Instrumental methods use an apparatus to measure physical quantities of the analyte such as light absorption, fluorescence, or conductivity

Answer 27

Classical quantitative analysis

Question 28

an apparatus to measure physical quantities

Answer 28

Instrumental methods

Question 29

to measure physical quantities of the analyte such as

Answer 29

light absorption, fluorescence, or conductivity.

Question 30

reveals the identity of the elements and compounds in a sample

Answer 30

Qualitative analysis

Question 31

indicates the amount of each substance in a sample.

Answer 31

Quantitative analysis

Question 32

acid test for

Answer 32

Gold

Question 33

test for the presence of blood Blood test Kastle-Meyer test - A drop of

Answer 33

Kastle-Meyer test