Analytical Chemistry 1 ✅

Question 1

What is analytical chemistry?

Answer 1

It is the science field evolving and adapting methods, devices and strategy for obtaining information about chemical composition, structure and energy state of substances.

Question 2

What sciences does analytical chemistry play a vital role in?

Answer 2

chemistry
biology biotechnology
food science
veterinary medicine
environmental science
etc.

Question 3

What are the two types of analysis?

Answer 3

Quantitative and Qualitative

Question 4

What is qualitative analysis?

Answer 4

Attempting to identify what materials are present in a sample.
eg. determination of chemical identity of the species in the sample.

Question 5

What is quantitative analysis?

Answer 5

Determing how much of a material is present in a sample.
eg. determination of the amount of species or analytes, in numerical terms.

Question 6

What are the major types of analysis?

Answer 6

instrumental, titrations and gravimetry

Question 7

What are gravimetric methods of analysis?

Answer 7

measure the mass of an analyte (or something chemically equivalent to the analyte).

Question 8

What are titrimetric (volumetric) methods of analysis?

Answer 8

Measure the quantity of a reagent needed to completely react the analyte.

Question 9

What is the instrumental method type of analysis?

Answer 9

use an instrumental technique to assay the amount of sample

Question 10

What are the instrumental methods (separation technique)?

Answer 10

1. chromatography
2. electrophoresis
3. electrochemistry

Question 11

What is chromatography?

Answer 11

Physical method of separation in which the components to be separated are distributed between two phases, one of which is stationary (stationary phase) while the other (the mobile phase) moves in a definite direction.

Question 12

What is electrophoresis?

Answer 12

is the motion of dispersed particles relative to a fluid under the influence of a spatially uniform electric field.

Question 13

What is electrochemistry?

Answer 13

oxidation reduction chemistry of analytes.

Question 14

What are the different criteria to selecting a method of investigation?

Answer 14

• precision
• bias/ shift
• sensitivity
• detection limit
• concentration range
• selectivity

Question 15

What are the 8 steps in chemical analysis?

Answer 15

1. formulating the question
2. selecting the analytical procedure (literature survey)
3. sampling
4. sample preparation (converting sample into a form suitable for chemical analysis)
5. chemical analysis
6. calibration curves
7. interpreting the results
8. draw conclusions

Question 16

what is the SI unit of mass?

Answer 16

kg

Question 17

what is the SI unit of volume?

Answer 17

cubic meter (m^3)

Question 18

what is the SI unit of length?

Answer 18

m

Question 19

what is the SI unit of temperature?

Answer 19

K

Question 20

what is the SI unit of the amount of substance?

Answer 20

mol

Question 21

what is the SI unit of electric current?

Answer 21

ampere (A)

Question 22

what does the prefix giga stand for?

Answer 22

10^9

Question 23

what does the prefix mega stand for?

Answer 23

10^6

Question 24

what does the prefix kilo stand for?

Answer 24

10^3

Question 25

what does the prefix deci stand for?

Answer 25

10^-1

Question 26

what does the prefix centi stand for?

Answer 26

10^-2

Question 27

what does the prefix mili stand for?

Answer 27

10^-3

Question 28

what does the prefix micro stand for?

Answer 28

10^-6

Question 29

what does the prefix nano stand for?

Answer 29

10^-9

Question 30

what does ppm stand for?

Answer 30

1mg solute /1L solution
part per million

Question 31

what does ppb stand for?

Answer 31

1microgram solute/1L solution
part per billion

Question 32

what does ppt stand for?

Answer 32

1ng solute/1L solution
part per trillion