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Environmental Chemistry 2022

Last updated over 3 years ago

20 questions

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Please use correct number of significant figures for all calculations.

Question 1

1.

A soil has a hydrogen ion concentration of [H+] = 3.5x10-5 M. What is the pH of the soil?

Question 2

2.

A soil has a hydrogen ion concentration of [H+] = 3.5x10-5 M. Is the soil acidic or alkaline?

Question 3

3.

A soil has a hydrogen ion concentration of [H+] = 3.5x10-5 M. What would you add to the soil to remedy this problem?

Question 4

4.

The Clean Water Act of 1972 includes the ‘‘Great Lakes’’ means Lake Ontario, Lake Erie, Lake Huron, Lake Michigan, Lake Superior and the act also includes this lake as part of the Great Lakes?

Question 5

5.

In the Clean Water Act, ‘Great Lakes States’’ means the States of Wisconsin, Pennsylvania, Illinois, Indiana, _________________, Michigan, Minnesota, and Ohio. Which state is missing?

Question 6

6.

This group is in charge of enforcing provisions in the Clean Water Act for any vessels found within the water systems specified in the act.

Question 7

7.

According to the Indiana Wastewater Operators Manual, all surface waters of the state are designated for ________________.

above water recreation

below water recreation

wastewater

Full-body contact recreation

Question 8

8.

According to the Indiana Wastewater Operators Manual, Also, all waters of the state, except limited use waters, must be capable of supporting a well-balanced, warm water _________________ community

Question 9

9.

What are the criteria used by IDEM to issue a sewer ban early warning (SBEW)? When IDEM determines a semipublic facility or POTW has reached or is approaching _________% of its hydraulic or organic design capacity, it will notify the facility of these conditions and it may be necessary to impose a sewer connection ban if action is not taken.

Question 10

10.

According to the IDEM, what does “NPDES” stand for?

Question 11

11.

When measuring PCB levels, what does PCB mean?

Question 12

12.

According to the IDEM, what does “control authority” mean?

Question 13

13.

What is the appropriate absorbance wavelength for ammonia(nm)?

Question 14

14.

What is the appropriate absorbance wavelength for phosphorus(nm)?

200

300

400

500

1200

1300

1400

Question 15

15.

For the Chemical Oxygen Demand(COD) Testing, what is the correct low range?

0-50 mg/L

0-100 mg/L

0-150 mg/L

0-300 mg/L

0-500 mg/L

0-600 mg/L

Question 16

16.

For the Chemical Oxygen Demand(COD) Testing, what is the correct high range?

0-500 mg/L

0-1000 mg/L

0-1500 mg/L

0-3000 mg/L

0-5000 mg/L

0-6000 mg/L

Question 17

17.

One factor that influences the absorbance of a sample is the concentration (c). If concentration increases, then absorbance ______________.

increases

decreases

remains the same

not enough information

Question 18

18.

What is the hydrogen ion concentration[H+] of a solution with a pH=12.10.

Question 19

19.

Given a water sample with a [H+] = 5.11x10-3 M, what is the pOH of the water sample?

Question 20

20.

Using a serial dilution, determine the amount of concentrated solution(in mL) is needed to prepare 10. mL of 1.0% NaOH from a concentrated solution of 10.0% 500. mL NaOH solution.