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WorksheetsAcids and bases
Total questions: 20
Worksheet time: 10mins
Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.
The substance in the beaker
is a base
is an acid
have neutral pH
doesn't have pH
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 _______.
acid pH less than 7
acid pH greater than 7
base pH less than 7
base pH greater than 7
Litmus paper can be used to determine the _______ of a substance
relative volume
relative pH
temperature
chemical formula
Which of the following statements is correct?
Blue litmus paper turns red when placed in a base.
Red litmus paper turns blue when placed in a base.
Blue litmus paper stays blue when placed in an acid.
Red litmus paper stays red when placed in a base.
The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?
3
7
9
5
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
strongly acidic
slightly acidic
strongly basic
slightly basic
When using pH paper, the pH of a solution can be determined by looking at the _______ of the paper
texture
mass
colour
length
What would be considered the weakest base?
8
7.8
11.6
14
Many cleaning solutions are bases. Which of the following is a property of most bases?
feels slippery
white color
can only be liquid
tastes sour
Pure water has a pH of 7. Pure water _______.
is a base
is a neutral substance
could be either an acid or a base
is an acid
A sour taste is a characteristic of:
acid
base
neutral
pH scale
pH is the measure of the concentration of ______.
Acids
H+ ion
OH- ion
Base
If a solution is basic which ion will be more present?
H+
K+
OH-
H-
Stronger acids have a pH closer to...
7
14
0
9
Weaker bases have a pH closer to...
8
14
0
4
A pH level of 7 indicates
acid
base
neutral
non of the following
The pH scale is a range from:
1-7
1-5
0-14
1-14
Which property is not associated with acids?
Sour taste
strong acids can burn you
turns litmus paper blue
reacts with metals
Which of the following is true about acids and bases?
The lower the pH #, the stronger the acid
the higher the pH #, the stronger the acid
The lower the pH #, the more neutral the acid
The higher the pH #, the weaker the base
You test a solution with pH paper, and the paper turns blue. The solution is ______.
neutral
an acid
a base
an acid & a base
