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8th Grade: Indicators
Test Description: Review topics related to acid-base indicators
Instructions: Answer all questions to get your test result.
1) Which of the following pHs would be considered an acid?
A
12
B
8
C
3
D
7
2) Tomatoes have a pH of 4 and lemons have a pH of 2. Which is a stronger acid?
A
Lemons
B
Both of bases
C
Tomatoes
D
there is not enough information to answer this question
3) If blue litmus stays blue, what does that tell you?
A
The item as to be a base
B
The item is an acid
C
The item is neutral
D
The item could be a base or neutral (more testing is needed)
4) What are two common indicators
A
pH and litmus paper
B
Litmus paper and OH paper
C
pH paper and red dye
D
pH paper and milk
5) Ammonia has a pH of 11.5. Which best describes it?
A
weak base
B
weak acid
C
strong base
D
strong acid
6) What is the range of the pH scale?
A
1-10
B
0-7
C
7-14
D
0-14
7) Which of the following would be the stongest base?
A
pH of 13
B
pH of 2
C
pH of 4
D
pH of 10
8) Which of the following would be the strongest acid?
A
pH of 4
B
pH of 13
C
pH of 10
D
pH of 2
9) What is the pH of pure water
A
13
B
There is not enough information
C
2
D
7
10) If red litmus stays red and blue litmus turns red in a substance, what can you conclude?
A
There isn't enough information
B
The substance is neutral
C
The substance is a base
D
The substance is an acid
*select an answer for all questions
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