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Chapter 2/3 Part 3
Test Description: Environmental Science Biochemistry Chapter
Instructions: Answer all questions to get your test result.
1) Why is the dissociation of water important?
A
It breaks water into atoms that define acids and bases.
B
It neutralizes acids and bases.
C
It combines ions to make acids and bases.
D
It breaks water into the ions that define acids and bases.
2) All of the following statements are true EXCEPT.
A
Bases have a pH > 7 and have more Hydroxide ions than Hydroniums.
B
Bases have a pH < 7 and have more Hydroxide than Hydronium.
C
Acids have a pH < 7 and have more Hydronium ions than Hydroxide.
D
Acids taste sour and are corrosive while bases are bitter and slippery.
3) ________ neutralizes small amount of acids and bases to maintain a certain pH.
A
Hydronium
B
pH
C
Hydroxide
D
Buffers
4) What do acids and bases have in common?
A
Both contain more hydroxide than hydronium ions.
B
Both must contain carbon.
C
Both contain more hydronium than hydroxide ions.
D
Both contain hydronium and hydroxide ions.
5) Why is water polar?
A
Hydrogen has more protons and pulls the electrons closer to it and away from oxygen.
B
Oxygen has more electrons and pulls the protons closer to it and away from hydrogen.
C
Hydrogen has more electrons and pulls the protons closer to it and away from oxygen.
D
Oxygen has more protons and pulls the electrons closer to it and away from hydrogen.
6) Water is called the _________ because it is very good at dissolving a lot of things.
A
Homogeneous solvent
B
Aqueous solvent
C
Universal solute
D
Universal solvent
7) Why is hydrogen bonding important in water?
A
It is responsible for the properties of water.
B
It holds the oxygen and hydrogen together.
C
It gives water is polar properties.
D
It makes water stick to everything.
8) _____ is the attraction between like particles.
A
specific heat
B
cohesion
C
adhesion
D
capillarity
9) _______ is the attraction between unlike particles.
A
adhesion
B
cohesion
C
capillarity
D
specific heat
10) _________ is the property of water that plants use to pull water from their roots to their leaves.
A
cohesion
B
capillarity
C
adhesion
D
surface tension
*select an answer for all questions
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