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CHM114 Chapters 1-7 Flashcards | StudBud
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CHM114 Chapters 1-7
CHM114 Chapters 1-7
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1
Which is NOT a characteristic of solutions in chemistry?
has solute and solvent
can be separated by crystalization if a liquid
can see the particles
homogeneous mixture
2
What is shear stress?
grinding pressure
biting pressure
pulling pressure
crushing pressure
3
What does a cation exchanger do in terms of water purification?
Removes anions from water
Removes cations from water
Removes particulates from water
Removes dissolved gases from water
4
Which group is the least reactive group on the periodic table?
noble gases
alkali metals
alkaline earth metals
5
The catalyzed reaction has a _____ activation energy and thus causes a _____ reaction rate.
higher, higher
lower, higher
lower, steady
higher, lower
6
What is the process of water purification which exchanges ions?
Filtration
Distillation
Deionization
Reverse Osmosis
7
What is solubility?
Water.
How well something dissolves.
Coffee.
A solute.
8
Which action would not prevent corrosion
Adding an inhibitor to a heating systems
Painting with a refrigerant
Chrome plating surfaces
Painting affected surfaces
9
2 most important factors of preventing corrosion
Removal of electrolyte
Addition of electrolyte
Removal of protective Coating
Application of protective Coating
10
Acid + base > Salt + ___
Helium
Carbonate
Metal
Water
11
Why doesn't helium form ions?
It can only bond covalently
It already has a full outer shell
It is a gas
It is a non-metal
12
What is the atomic mass of Aluminum (Al)?
13
27
14
31
13
Which subatomic particles are located inside the nucelus of an atom?
electrons & neutrons
protons & neutrons
protons & electrons
electrons & protons
14
The subatomic particles in chemistry are elements, compounds, and mixtures
False
True
15
7. In chemistry, what happens if you add an acid to a base?
Neutralization
Annihilation
Nothing
Elimination
16
What are the three common phases of matter?
Solid, liquid, and gas
Color, shape, and size
Temperature, pressure, and density
Mass, volume, and density
17
what is tensile stress?
pulling
biting
pushing
grinding
18
Ions are...
Always positive
Charged particles formed when atoms lose or gain electrons
Very unreactive
Always negative
19
How do ion exchange columns soften water?
They kill any microbes in the water
The column exchanges Na+ for Mg2+ and Ca2+
The column exchanges HCO3- for Mg2+ and Ca2+
They produce an insoluble precipitate of calcium carbonate
20
Which of the following is an example of condensation?
Ice melting into water
Water freezing into ice
Water vapor turning into dew
Water evaporating into vapor
21
neutral pH, when discussing chemistry, is
7
5
9
3
22
During a chemical reaction, the atoms rearrange themselves to form new...
Energy
Nuclei
Molecules
Elements
23
What are the horizontal rows on the periodic table called?
Actinides
Periods
Elements
Groups
24
President Truman decided to drop the atomic bomb on which country
Japan
Italy
Russia
Germany
25
In chemistry, solutions are
Neutral
Heterogeneous
Homogeneous
Answers
26
In an ionic bond, atoms...
Stick together
Lose all their outer shell electrons
Lose protons from the nucleus
Donate/receive electrons from/to their outer shell
27
How many individual iron atoms are in one molecule of Fe
2
O
3
?
6
2
3
5
28
What is "Matter" in Chemistry?
Time
Substance
Energy
Force
29
(Chemistry) What is a base?
A solution that turns red litmus blue
A solution that turns blue litmus red
30
what is compressive stress?
grinding pressure
biting pressure
pulling pressure
crushing pressure
31
What are the vertical rows on the periodic table called?
Actinides
Elements
Periods
Groups
32
Where are the non-metals found on the periodic table?
Left hand side
Top
Right hand side
Bottom
33
Where are metals found on the periodic table?
Bottom
Top
Left hand side
Right hand side
34
What type of bond forms when atoms share a pair of electrons?
Ionic
Peptide
Hydrogen
Covalent
35
What is evaporation?
Changing from a liquid to a gas below the boiling point
Changing from a gas to liquid at the boiling point
Changing from a gas to a solid at the deposition point
Changing from a liquid to a gas at the boiling point
36
What is an atom?
Mixture of compounds
Smallest unit of matter
Corrosive substances
The result of a chemical reaction
37
Deionization or ion exchange, is a water treatment process that involves removing ionized minerals and salts from water.
False
True
38
What type of water purification involves using an exchange resin with cations and anions?
Distilled
Reverse osmosis
Activated charcoal
Deionized
39
Two different
isotopes
will have...
different protons, same neutrons
different protons, different neutrons
Same protons, same neutrons
Same protons, different neutrons
40
Which substance's solubility decreases as temperature increases?
CaCl2
NaCl
KNO3
Ce2(SO4)3
41
If corrosion is found within the body of a relief valve, the valve must be:
reconditioned
replaced.
cleaned
repaired
42
Chemical or Physical Property? Corrosion (Rusting)
Physical
Chemical
43
During radioactive decay, atomic nuclei of unstable isotopes _____.
are unchanged
are broken down by radioactive bacteria
give off nuclear radiation
form chemical bonds
44
What atomic number is helium?
5
2
7
9
45
Which of these is
not
a method for preventing corrosion?
Covering in a less reactive metal
Coating in water
Coating in oil
Covering in a sacrificial metal
46
In which type of matter will molecules and atoms will spread out to fill any container?
solid
gas
liquid
47
How many individual oxygen atoms are in one molecule of Fe
2
O
3
(H
2
O)?
4
3
1
7
48
Chemistry: What changes is taking place when you boil water?
Physical
Chemical
49
Which factor does not affect rate of reaction?
Concentration
Pressure
Temperature
Time
50
An atom, as shown on the periodic table, is neutral because it contains equal numbers of
neutrons and ions
protons and electrons
isotopes and ions
protons and neutrons
51
The number of protons an atom contains is identified by the ____ ____ on the periodic table.
group #
row #
atomic #
mass #
52
How many oxygen atoms are there in a water molecule?
2
4
3
1
53
Which group is the most reactive group on the periodic table?
alkaline earth metals
noble gases
alkali metals
54
Chemistry: Not an Acid
conductive
sour
corrosive
slippery
55
What is Galvanic Corrosion?
Two of same metals places against each other
Two Dissimilar metals places against each other
56
If the solution is an OH
-
donor it is
a Base
an Acid
Neutral
57
CHEMISTRY: What technique would you use to separate a mixture of sand and water?
Evaporation
Filtration
Distillation
Chromatography
58
To become a positive ion, an atom must ___________ .
lose electrons
lose protons
gain protons
gain electrons
59
Which of the following affects the solubility of a solute? (select 2)
Being buff.
Particle size.
Temperature.
Filtering.
60
Which of the following is the charge of ions formed by group 2 metals?
2+
1+
2-
1-
