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WorksheetsAcids, Bases, pH
Total questions: 20
Worksheet time: 40mins
Which characteristics describe an acid?
tastes sour, litmus indicator turns red
tastes bitter, litmus indicator turns blue
tastes sweet and sour, litmus indicator turns red
tastes sour and bitter, litmus indicator turns blue
Which characteristics describe a base?
tastes sour, litmus indicator turns blue
tastes bitter, litmus indicator turns blue
tastes bitter sour, litmus indicator turns blue green
tastes bitter sour, litmus indicator turns green
Which of the following is an acid?
soap
baking soda
orange juice
water
Which of the following is a base?
carbonated water
lime juice
vinegar
dishwashing detergent
What property do all three of these fruits have in common?
taste bitter sweet
cannot conduct electricity
have pH below 7
turn litmus paper blue
What property do all three of these household items have in common?
sometimes conduct electricity
taste soapy
have a pH equal to or above 7
turn litmus paper blue
What is present in aqueous solutions of an acid or alkali that allow them to conduct electricity?
mobile electrons
mobile ions
mobile atoms
mobile molecules
When Sally tested an unknown solution, her red litmus paper turned blue, but her blue litmus paper remained blue. What does this indicate?
unknown is acidic
unknown is alkaline
unknown is neutral
unknown can be acidic, alkaline or neutral
Which statement is correct?
Blue litmus paper turns red in alkaline solution.
Red litmus paper turns blue in acidic solution.
Blue litmus paper remains blue in acidic or neutral solution.
Red litmus paper remains red in acidic or neutral solution.
The pH scale is a range from
1 to 7
0 to 14
1 to 14
1 to 20
Which statement is true?
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 alkali
A very strong acid would have a pH of
1
7
9
14
A weak alkali would have a pH of
8
7
6
14
A solution with a pH of 3.6 would be
acidic
alkaline
neutral
acidic and alkaline
A solution with a pH of 8.6 would be
acidic
alkaline
neutral
acidic and alkaline
If you have a solution that is very acidic with a pH of 3.5, what can you do to raise the pH of the solution?
add an acid
add more water
increase the temperature
add a base
What is the colour of universal indicator in pure water?
red
blue
violet
green
What is the colour of universal indicator in a solution of pH 4?
red
yellow
blue
green
Rain water is slightly acidic. What is its pH?
1.0
5.6
7.0
8.2
What would happen to the blue and red litmus papers when they are dipped into a sample of acid rain?
Blue litmus paper remains blue and red litmus paper remains red.
Blue litmus paper turns red and red litmus paper turns blue.
Blue litmus paper remains blue and red litmus paper turns blue.
Blue litmus paper turns red and red litmus paper remains red.
