Question 1
The atoms in acids share electrons.
True
False
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Question 2
Acids separate into ions when placed in water.
True
False
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Question 3
Acids always contribute H
+
ions to water solutions.
True
False
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Question 4
The pH is a way of expressing the concentration of the H
+
ions in water solutions.
True
False
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Question 5
All substances are either acidic or basic.
True
False
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Question 6
A solution is neutral when the pH is:
4
7
10
None of the above.
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Question 7
What is the pH of a solution that has a concentration of 1.0 x 10
-5
? Would it be acidic or basic?
pH = 5, acidic.
pH = 5, basic.
pH = 7, neutral.
pH = 9, acidic.
pH = 9, basic.
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Question 8
What is the pH of a solution that has a concentration of 1.0 x 10
-10
? Would it be acidic or basic?
pH = 10, acidic.
pH = 10, basic.
pH = 7, neutral.
pH = 4, acidic.
pH = 4, basic.
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Question 9
What is the concentration of solution when pH = 2? Would it be acidic or basic?
10
-2
, acidic.
10
-2
, basic.
10
-7
, neutral.
10
-12
, acidic.
10
-12
, basic.
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Question 10
What is the concentration of solution when pH = 9? Would it be acidic or basic?
10
-9
, acidic.
10
-9
, basic.
10
-5
, acidic.
10
-5
, basic.
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Question 11
Acids are molecules that stay together because they share electrons.
True
False
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Question 12
Acids have some properties in common with ionic compounds.
True
False
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Question 13
The simple definition of an acid is any substance that provides H
+
ions to water solutions.
True
False
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Question 14
Acidic water solutions have extra H
+
ions.
True
False
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Question 15
Basic solutions have extra OH
-
ions.
True
False
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Question 16
Acids and bases combine to form a salt and water.
True
False
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Question 17
Acids provide a transition between ionic compounds and molecules.
True
False
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Question 18
Even though acids stay together by sharing electrons, they separate into ions when placed in water.
True
False
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Question 19
Acids always separate into an H
+
ion and a negative ion when placed in water.
True
False
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Question 20
Pure acids stay together because they share electrons and not because of opposite charges attracting.
True
False
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Question 21
A famous acid is hydrochloric acid (HCl).
True
False
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Question 22
When HCl is placed in water the molecule separates into H
+
and Cl
-
ions.
True
False
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Question 23
Common concentrations of H
+
ions in solutions range from 1.0 x 10
-1
M (0.1 M) to 1.0 x 10
-14
M (0.00000000000001 M).
True
False
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Question 24
Knowing the concentration we can determine the pH and whether the solution is acidic or basic.
True
False
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Question 25
A pH below seven is:
acidic.
basic.
neutral.
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Question 26
A pH above seven is:
acidic.
basic.
neutral..
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Question 27
The pH scale commonly in use ranges from 0 to 14.
True
False
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Question 28
Acids are corrosive to metals.
True
False
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Question 29
Acids change litmus paper
red.
blue.
green.
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Question 30
Bases change litmus paper
red.
blue.
green.
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Question 31
Bases are also called
halogens.
alkaline compounds.
amphoteric.
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Question 32
Bases denature proteins and make them feel very slick.
True
False
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Question 33
Acids are
amphiprotic.
proton acceptors.
proton donors.
None of the above.
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Question 34
Bases are
amphiprotic.
proton acceptors.
proton donors.
None of the above.
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Question 35
Hydronium is a water molecule plus a proton.
True
False
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Question 36
All acids produce hydronium ions when placed in water.
True
False
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Question 37
Water is
amphoteric.
amphiprotic.
can act as either an acid or a base.
All of the above.
None of the above.
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Question 38
Pure water dissociates slightly to give some hydronium ions and hydroxide ions.
True
False
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Question 39
Which of the following would produce Hydrogen ions in an aqueous solution and would turn litmus paper from blue to red?
Ammonia
Table Salt
Vinegar
Drano
None of the above.
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