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