Introduction

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

Reveals the identity of elements and compounds in a sample

Answer 2

Qualitative

Question 3

Indicates the amount of each substance in a sample

Answer 3

Quantitative

Question 4

Components of a sample that are to be determined

Answer 4

Analytes

Question 5

Results of a typical quantitative analysis are computed from two measurements:

Answer 5

1. Mass or the volume

2. Quantity that is proportional

Question 6

These are Quantity that is proportional

Answer 6

Mass, volume, intensity of light, electrical charge

Question 7

Analytical method according to mass of the analyte or some compound chemically related to it

Answer 7

Gravimetric

Question 8

Analytical method according to the nature of the volume of a solution containing suffcient reagent to react completely with the analyte

Answer 8

Volumetric Method

Question 9

Analytical method which invloves electrical properties such as voltage, current, resistance and quantity of electrical charge

Answer 9

Electroanalytical methods

Question 10

Analytical method that is based

Measurement of the interaction between electromagnetic radiation and analyte atoms

Answer 10

Spectroscopc Method

Question 11

In the flow diagram showing the steps in a quantitative analysis:

What happens when the sample is soluble?

Answer 11

Proceed to the question: is it measurable property

Question 12

In the flow diagram showing the steps in a quantitative analysis:

What should you do if the property of sample is measurable?

Answer 12

Eliminate interferences

Question 13

In the flow diagram showing the steps in a quantitative analysis:

What should you do if the sample is not soluble ?

Answer 13

Carry out chemical dissolution

Question 14

In the flow diagram showing the steps in a quantitative analysis:

What should you do after you carry out chemical dissolution?

Answer 14

Know whether is it a measurable property

Question 15

In the flow diagram showing the steps in a quantitative analysis:

What should you do if the property of sample is not measurable?

Answer 15

Change the chemical form then eliminate the interferences

Question 16

These are the first 3 steps in the flow diagram showing the steps in a quantitative analysis

Answer 16

Select method
Acquire sample
Process sample

Question 17

It is the first question to be considered in the selection process of picking a method

Answer 17

Level of accuracy is required

Question 18

In picking a method, It is the second consideration related to economic factors.

Answer 18

Number of samples to be analyzed

Question 19

It influences the choice of method to some degree in picking a method

Answer 19

Complexity of the sample and the number of components in the sample

Question 20

It invloves obtaining a small mass of material whose composition accurately represents the bulk of the material being sampled

Answer 20

Sampling

Question 21

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

Answer 21

Sampling

Question 22

A material is known as _________ if its constituent parts can be distinguished visually or the aid of a microscope

Answer 22

Heterogenous

Question 23

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

Answer 23

Assay

Question 24

We analyze________ and we determine _____________

Answer 24

Sample and substances

Question 25

No sample processing is required prior to the ______________ step

Answer 25

Measurement

Question 26

We must process the sample in _______________ ways

Answer 26

Variety of different

Question 27

A solid sample is _______ and ______ to ensure homogeneity

Answer 27

Ground and mixed

Question 28

Sample should be ________for various length of time before analysis begins

Answer 28

Stored

Question 29

Because of loss or gain of water it changes the composition of solids, it is a good idea to _______ samples before starting an analysis

Answer 29

Dry

Question 30

The ___________of the sample can be determined at the time of the analysis in a separate analytical procedure

Answer 30

Moisture content

Question 31

Liquid samples are subject to ______________

Answer 31

Solvent evaporation

Question 32

If the analyte is a gas dissolved in liquid, analyte must be kept inside __________________ to prevent contamination by ___________________ gases

Answer 32

Second sealed, atmospheric

Question 33

Extraordinary measures, including sample manipulation and measurement in an inert atmosphere, may be required to preserve the _____________ of the sample

Answer 33

Integrity

Question 34

Portions of a material of approximately the same size carried through analytical procedure at the same time and same way

Answer 34

Replicate samples

Question 35

Provides reliability of the experiment and it has atleast 3 same results

Answer 35

Replicate sample

Question 36

Replication improves what?

Answer 36

Quality of result and reliability

Question 37

How does a solvent disolve the entire sample including the analyte

Answer 37

Rapidly and completely

Question 38

The sample may require ___________ with aquaous solution

Answer 38

Heating

Question 39

It may be necessary to _______ the sample in all or oxygen to perform a high-temperature fusion of the sample in the presence of various fluxes

Answer 39

Ignite

Question 40

Species other than the analyte that affect the final measurement is called?

Answer 40

Interferences or interferents

Question 41

Species that cause an error in analysis by enhancing or attenuating the quantity being measured

Answer 41

Interference

Question 42

Tecniques or reaction that work for only one analyte are said to be _________

Answer 42

Specific

Question 43

Techniques or reactions that apply for only a few analytes are____________

Answer 43

Selective

Question 44

It is all of the components in the sample containing analyte

Answer 44

Matrix or sample matrix

Question 45

Measurement of the property is ___________ to the concentration

Answer 45

Directly proportional

Question 46

Process of determining the proportionality between analyte concentration and a measured quantity

Answer 46

Calibration

Question 47

Computing analyte concentrations are based on

Answer 47

Raw experimental data

Question 48

Where can you collect raw experimental data?

Answer 48

Measurement step, instruments and stoichiometry of the reaction

Question 49

The analytical results are incomplete without an estimate of ________

Answer 49

Reliability

Question 50

Analytical results without an estimate of reliabilty is

Answer 50

No value

Question 51

It is the first step in a feedback control system

Answer 51

Start control system

Question 52

After you start the contro system what should you determine?

Answer 52

Desired state or the normal values

Question 53

After you determine the desired state what should you do?

Answer 53

Measure the actual state

Question 54

After measuring the actual state what should you do?

Answer 54

Display results

Question 55

After displaying the results what should you do next?

Answer 55

Verify if the desired state actual

Question 56

If the desired state is actual what shoul you do next?

Answer 56

Delay, try to make sure that it works

Question 57

If the desired state is not actual what should you do?

Answer 57

Repeat the process and change control quantity

Question 58

Process of continous measurement and control

Answer 58

Feedback system

Question 59

Cycle of measurement, comparison and control

Answer 59

Feedback loop

Question 60

Standardized system of unit

Answer 60

International System of Units (SI)

Question 61

SI is the acronym for the french word?

Answer 61

Systeme international d’unites

Question 62

This unit is widely used to express wavelength

Answer 62

Angstrom

Question 63

Number of moles of solute species in one liter of solution

Answer 63

Molar concentration

Question 64

Dimension of molarity

Answer 64

Mol L^-1

Question 65

Gives the total number of moles of a solutein 1L of the solution

Answer 65

Analytical molarity

Question 66

Express the molar concentration of a paricular species in a solution

Answer 66

Equilibrium molarity