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6.2 Review
Test Description: Review pH, water properties, and diffusion for Friday's test!
Instructions: Answer all questions to get your test result.
1) Which feature of water explains why water has high surface tension?
A
water diffuses into cells
B
water expands when it freezes
C
water's resistance to temperature changes
D
water is a polar molecule
2) Which of the following applies to a water molecule?
A
Water is a nonpoplar molecule
B
Water molecules have a negatively charged end and a positively charged end.
C
The weak bond between two water molecules is a covalent bond.
D
The atoms in water are bonded by ionic bonds.
3) __________ occurs from areas of higher concentration.
A
dynamic equilibrium
B
polar molecule
C
hydrogen bonds
D
diffusion
4) Result of diffusion where there is continuous movement of particles but no overall change in concentration.
A
hydrogen bonds
B
diffusion
C
dynamic equilibrium
D
polar molecule
5) Weak chemical bond formed by the attrraction of positively charged hydrogen atoms to other negatively charged atoms
A
diffusion
B
hydrogen bonds
C
dynamic equilibrium
D
polar molecule
6) Any substance that forms hydroxide ions (OH-) in water and has a pH above 7.
A
polar molecule
B
acid
C
neutral
D
base
7) Any substance that forms hydrogen ions (H+) in water and has a pH below 7.
A
neutral
B
base
C
polar molecule
D
acid
8) The property that describes the ability of water molecules to stick to each other.
A
density
B
adhesion
C
pH
D
cohesion
9) The property that describes water molecules ability to stick to other surfaces.
A
pH
B
adhesion
C
density
D
cohesion
10) A molecule with an unequal distribution of charge, resulting in the molecule having a positive end and a negative end.
A
polar
B
nonpolar
C
hydrogen
D
pH
*select an answer for all questions
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