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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 stop feeding
C
They will be stressed
D
All of the above are correct answers
2) For bacteria to live in hot springs (such as at Yellowstone National Park), they must be adapted to what type of environment?
A
Basic
B
Acidic
C
Alkaline
D
Neutral
3) Which of the following best describes the pH scale?
A
Aramaic
B
Exponential
C
Alphabetic
D
Logarithmic
4) Which of the following can affect the pH of a body of water?
A
Chemicals that you pour into the water
B
(a), (b) and (c)
C
Algae that live in the water
D
Minerals in the water
5) What does
A
The concentration of Hydrogen ions in a solution
B
The
C
(a) and (c) are both correct answers
D
The volume of water in a container
6) What range of pH values would you expect in an acidic solution?
A
10.0-11.0
B
8.0 - 9.0
C
0.0 – 6.0
D
Both (a) and (b) are correct answers
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
1
B
19
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
High concentration of sulfuric and nitric acids
D
Same pH as normal rain
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
10.0
B
13.6
C
4.0
D
5.0
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
12 x 100 mol/L
C
-1 x 10-2 mol/L
D
1 x 1012 mol/L
*select an answer for all questions
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