Exam 1

Question 1

What are the general steps in a chemical analysis?

Answer 1

Formulate the question, select analytical procedures, sample, sample preparation, analysis, reporting and interpretation, and drawing conclusions

Question 2

How do you construct a representative sample?

Answer 2

Take a lot of samples from different sources

Question 3

giga

Answer 3

10^9

Question 4

mega

Answer 4

10^6

Question 5

kilo

Answer 5

10^3

Question 6

hecto

Answer 6

10^2

Question 7

deca

Answer 7

10^1

Question 8

deci

Answer 8

10^-1

Question 9

centi

Answer 9

10^-2

Question 10

milli

Answer 10

10^-3

Question 11

micro

Answer 11

10^-6

Question 12

nano

Answer 12

10^-9

Question 13

pico

Answer 13

10^-12

Question 14

what is the formula for ppm?

Answer 14

mass substance/mass sample x 10^6 (1 ug/mL)

Question 15

what is the formula for ppb?

Answer 15

mass substance/mass sample x 10^9 (1 ng/mL)

Question 16

what is weight percent?

Answer 16

mass solute/mass solution X 100

Question 17

what is volume percent?

Answer 17

volume solute/volume solution x 100

Question 18

what is molality

Answer 18

mol solute/ kg solvent

Question 19

to move equilibrium, what does the substance have to be?

Answer 19

in the reaction quotient (no solids or liquids)

Question 20

What is the difference between TC and TD?

Answer 20

TC means to contain and TD means to deliver

Question 21

what is the process of gravimetric analysis?

Answer 21

precipitate a reaction, then filter, wash, and dry. the product is then used to figure out how much was in the original reaction

Question 22

what are the methods of sample preparation?

Answer 22

dissolving inorganics with strong acids, fusion, digestion, and extraction

Question 23

what is the difference between systematic and random error

Answer 23

systematic is repeated, random error cannot