Qize/Test 2 material

Question 1

DOC

Answer 1

Dissolved Organic Carbon

Question 2

Dissolve Organic Carbon

Answer 2

The sum of all carbons on all organic molecules in an aqueous sample.

Question 3

DOC is all carbon from organic compounds except inorganic carbon:

Answer 3

CO2, H2CO3, HCO3-, CO3 2-

Question 4

What causes a longer retention time in Ion Chromatography?

Answer 4

Attraction to the stationary phase

Question 5

What causes a shorter retention time in Ion Chromatography?

Answer 5

Affinity to the stationary phase

Question 6

In temporal trends of Wilmington NC rainwater, if SO2 emissions increase what will happen to H2SO4 and H2O2?

Answer 6

H2SO4 will increase and H2O2 will decrease

Question 7

In temporal trends of Wilmington NC rainwater, if SO2 emissions decrease what will happen to H2SO4 and H2O2?

Answer 7

H2SO4 will decrease and H2O2 will increae

Question 8

In temporal trends of Wilmington NC rainwater, what are the effects on rain water with there are localized emissions of NH3?

Answer 8

-NH3 increases
-pH increases
-H+ decreases
-NH4 increases

Question 9

Ion Chromatography
For HNO3 (nitric acid) —>

Answer 9

[NO3-]=[HNO3]

Question 10

Ion Chromatography
For H2SO4 —>

Answer 10

[SO4 2-] sometimes=[H2SO4]
or lower

Question 11

In chromotography what is the order of retention time slowest to fastest for:

NO3-
Cl-
SO4 2-

Answer 11

SO4 2- 7.9 mins
NO3- 3.9 mins
Cl- 2.1 mins