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PH
Test Description: Water Quality Attribute
Instructions: Answer all questions to get your test result.
1) How will organisms be affected if the pH of their environment changes and is now outside of their acceptable levels?
A
They will stop reproducing
B
They will be stressed
C
All of the above are correct answers
D
They will stop feeding
2) For bacteria to live in hot springs (such as at Yellowstone National Park), they must be adapted to what type of environment?
A
Acidic
B
Alkaline
C
Basic
D
Neutral
3) Which of the following best describes the pH scale?
A
Aramaic
B
Alphabetic
C
Exponential
D
Logarithmic
4) Which of the following can affect the pH of a body of water?
A
Algae that live in the water
B
(a), (b) and (c)
C
Minerals in the water
D
Chemicals that you pour into the water
5) What does
A
(a) and (c) are both correct answers
B
The concentration of Hydrogen ions in a solution
C
The
D
The volume of water in a container
6) What range of pH values would you expect in an acidic solution?
A
8.0 - 9.0
B
Both (a) and (b) are correct answers
C
10.0-11.0
D
0.0 – 6.0
7) Given that a solution of Kool-Aid has a concentration of Hydrogen ions equal to 1 x 10-9 mol/L, what would its pH be?
A
19
B
1
C
-9
D
9
8) Which of the following is a characteristic of acid rain?
A
High concentration of hydroxyl ions (OH-)
B
Higher pH than normal rain
C
Same pH as normal rain
D
High concentration of sulfuric and nitric acids
9) If the following pH readings were taken from various spots along the Brazos River, what is the average pH of the river? Readings: 3.2, 3.8, 5.4, 4.0 and 3.6
A
5.0
B
10.0
C
4.0
D
13.6
10) Using scientific notation, how would you express a pH of 12.0 in terms of the concentration of Hydrogen ions in the solution?
A
1 x 10-12 mol/L
B
-1 x 10-2 mol/L
C
12 x 100 mol/L
D
1 x 1012 mol/L
*select an answer for all questions
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