Worksheetsuntitled
Total questions: 48
Worksheet time: 57mins
Name
Class
Date
1.
Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
a)
Acids; pH less than 7
b)
Acids; pH greater than 7
c)
Bases; pH greater than 7
d)
Bases; pH less than 7
2.
If an acid is combined with a base of equal strength, the result will most likely be
a)
a neutral solution.
b)
a stronger acid.
c)
impossible to tell without testing the pH.
d)
a stronger base
3.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)
dishwashing detergent
4.
Which of the following is an acid?
a)
shampoo
b)
baking soda
c)
orange juice
d)
water
5.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
6.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
7.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
8.
Explain what happens when a strong acid and a strong base are poured into the same container.
a)
they form separate layers
b)
they mix physically but not chemically
c)
they break apart into separate elements
d)
they react chemically to form a salt
9.
On the pH scale what numbers are bases?
a)
8-14
b)
0-7
c)
7
d)
1
10.
On the pH scale what numbers are acids?
a)
8-14
b)
0-7
c)
7
d)
1
11.
On the pH scale what numbers are neutrals?
a)
8-14
b)
0-7
c)
7
d)
1
12.
The pH scale measures...
a)
...the strength of an acid.
b)
...the strength of hydrogen ions.
c)
...the concentration of hydrogen ions.
d)
...the concentration of an acid
13.
Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a oily feel, a bitter taste, and a _______.
a)
Acids; pH less than 7
b)
Acids; pH greater than 7
c)
Bases; pH greater than 7
d)
Bases; pH less than 7
14.
Which type of ion does an acid produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydronium
d)
hydroxide
15.
When an equal strength acid and base are mixed, what kind of chemical reaction occurs?
a)
Neutralization
b)
Combustion
c)
Oxdation
d)
Decomposition
16.
Ammonia has a pH of 12. Ammonia is __________.
a)
an acid
b)
a base
c)
an element
d)
a metal
17.
Soap is a weak base. What is true about the taste of bases?
a)
they taste sour
b)
they taste sweet
c)
they taste bitter
d)
they taste salty
18.
Explain what happens when a strong acid and a strong base are poured into the same container.
a)
they form separate layers
b)
they mix physically but not chemically
c)
they break apart into separate elements
d)
they react chemically to form a salt
19.
When dissolved in water, bases produce:
a)
acids
b)
salts
c)
hydrogen ions
d)
hydroxide ions
20.
Which of these solutions is an acid?
a)
Dish Soap: pH of 12
b)
Tomato Soup: pH of 4
c)
Baking Soda: pH of 9
d)
Drain Cleaner: pH of 14
21.
What does the pH scale measure?
a)
the concentration of acids and bases
b)
the malleability of a metal
c)
the temperature of the water in a swimming pool
d)
the amount of phosphorus in a compound
22.
Compounds form when _______________.
a)
atoms of one element bond together
b)
atoms of two or more elements bond together
c)
molecules of one element are mixed together
d)
molecules of two or more elements are mixed together
23.
The pH of vinegar is 2.5. Vinegar is a _____________.
a)
strong acid
b)
strong base
c)
weak base
d)
weak acid
24.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
25.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
26.
Which statement is true when acids and bases are mixed together?
a)
acids become stronger
b)
bases become stronger
c)
there is no change
d)
they neutralize each other
27.
Ranging from 0 to 14, a pH value indicates how acidic or basic a solution is. Which of these pH values would be a strong acid?
a)
2
b)
6
c)
9
d)
13
28.
What is the pH of water?
a)
0
b)
4
c)
7
d)
14
29.
Williams collected a rain sample and measured its pH to be 5.6. What does this mean?
a)
the rain water is a weak base
b)
the rain water is neutral
c)
the rain water is a strong acid
d)
the rain water is a weak acid
30.
What does a pH of 1 indicate about a liquid?
a)
it is a very strong base
b)
it is a weak base
c)
it is a weak acid
d)
it is a strong acid
31.
Litmus paper can tell you if a solution is acidic, neutral or basic by changing color when placed in a solution. If you test a base with litmus paper, it will turn ____________.
a)
purple
b)
red
c)
blue
d)
pink
32.
What is the pH of a neutral substance?
a)
0
b)
5
c)
7
d)
10
33.
Which of these pH values would indicate that a solution is a weak base?
a)
4
b)
5.6
c)
8
d)
13
34.
When dissolved in water, acids produce:
a)
bases
b)
salts
c)
hydrogen ions
d)
hydroxide ions
35.
Any substance that produces hydroxide ions in water is known as _____________.
a)
an acid
b)
a hydrogen ion
c)
a base
d)
a neutral
36.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
37.
Many cleaning solutions are bases. Which of the following is a property of most bases?
a)
feels slippery
b)
white color
c)
can only be liquid
d)
tastes sour
38.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
39.
Carrie's teacher hands out test tubes filled with different chemicals and tells the students to identify their liquid as an acid, base, or neutral chemical. Carrie's test tube contains a clear chemical. She adds phenolpthalein to her test tube and gently moves the tube from side to side. A few moments later, the chemical in the test tube turns bright pink.
What type of chemical does Carrie have?
What type of chemical does Carrie have?
a)
Carrie has a neutral chemical.
b)
Carrie has an acidic chemical.
c)
Carrie has a basic chemical.
d)
The type of chemical Carrie has cannot be determined.
40.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
41.
Which is the stronger acid?
a)
pH 1
b)
pH 4
c)
pH 8
d)
pH 13
42.
In a base phenolphthalein will give what color?
a)
Green
b)
Blue
c)
Pink
d)
Clear
43.
Turns litmus blue.
a)
Acids
b)
Bases
c)
Salts
d)
All
44.
Turns litmus red
a)
Acids
b)
Bases
c)
All
45.
Which has a pH above 7?
a)
Acid
b)
Base
46.
Which has a pH below 7?
a)
Acid
b)
Base
47.
When put into a basic solution, red litmus paper ________.
a)
stays red
b)
turns blue
c)
turns magenta
d)
turns violet
48.
When put into a solution that is basic, phenolphthalein turns __________.
a)
blue
b)
violet
c)
black
d)
magenta
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