WorksheetspH Levels & Litmus Paper
Total questions: 40
Worksheet time: 20mins
On a pH scale of 1-14, rates 1-6 can be considered _______ solutions.
acidic
basic
semi-basic
neutral
On a pH scale of 1-14, a rate of 7 can be considered a _______ solution.
acidic
basic
semi-basic
neutral
On a pH scale of 1-14, rates 8-14 can be considered _______ solutions.
acidic
basic
semi-acidic
neutral
Of the following pH rates, which rate can be considered the most acidic?
12
8
3
2
Of the following pH rates, which rate can be considered the most basic?
12
8
3
2
Rank the following recorded pH rates in order from most acidic to least acidic (12, 3, 8, 2)
12, 8, 3, 2
2, 3, 8, 12
3, 8, 2, 12
A mystery solution is discovered. A red and blue litmus paper has been placed in the solution. After 30 minutes, the red litmus paper remains red. The blue litmus paper has turned red. What type of solution is this?
This is an example of an acid
This is an example of a base
This is an example of a acid and base
Not enough information is provided to draw a conclusion
A second mystery solution is discovered. A red and blue litmus paper has been placed in the solution. After 30 minutes, the red litmus paper turns blue. The blue litmus paper remains blue. What type of solution is this?
This is an example of an acid
This is an example of a base
This is an example of a acid and base
Not enough information is provided to draw a conclusion
A second mystery solution is discovered. A red and blue litmus paper has been placed in the solution. After 30 minutes, the red litmus paper remains red. The blue litmus paper remains blue. What type of solution is this?
This is an example of an acid
This is an example of a base
This is an example of a acid and base
This is an example of a neutral solution
Acids:
Red Litmus Paper-> Red
Blue Litmus Paper -> Blue
Red Litmus Paper-> Red
Blue Litmus Paper -> Red
Red Litmus Paper-> Blue
Blue Litmus Paper -> Blue
Red Litmus Paper-> Blue
Blue Litmus Paper -> Red
Bases:
Red Litmus Paper-> Red
Blue Litmus Paper -> Blue
Red Litmus Paper-> Red
Blue Litmus Paper -> Red
Red Litmus Paper-> Blue
Blue Litmus Paper -> Blue
Red Litmus Paper-> Blue
Blue Litmus Paper -> Red
Neutral Solutions:
Red Litmus Paper-> Red
Blue Litmus Paper -> Blue
Red Litmus Paper-> Red
Blue Litmus Paper -> Red
Red Litmus Paper-> Blue
Blue Litmus Paper -> Blue
Red Litmus Paper-> Blue
Blue Litmus Paper -> Red
What type of chemical properties do acids possess?
Acids possess hydroxide (OH-)
Acids possess hydrogen ions (H+)
Acids possess hydride ions
Acids possess hydroxyl ions
What type of chemical properties do bases possess?
Bases possess hydroxide atoms (OH-)
Bases possess hydrogen ions (H+)
Bases possess hydride ions
Bases possess hydroxyl ions
Food items that are bitter such as vegetables, chocolate, and meats can all be considered slightly
Bases
Acids
Neutral
Neutral and Acids
Food items that are sour such as citrus fruits can be considered slightly
Bases
Acids
Neutral
Neutral and Acids
An unknown substance accidentally spills. One student accidentally touches the solution believing it to be water. The solution quickly burns his hand. Is this mystery substance an acid or base?
The solution is a acid. Acids make all objects it comes into contact with feel slippery
The solution is a base. Bases make all objects it comes into contact with feel slippery
The solution is an acid. Acids burn objects it comes into contact with causing irritation
The solution is a base. Bases burn objects it comes into contact with causing irritation
An unknown substance accidentally spills. One student accidentally touches the solution believing it to be water. The solution quickly makes his hand feel soapy. Is this mystery substance an acid or base?
The solution is a acid. Acids make all objects it comes into contact with feel slippery
The solution is a base. Bases make all objects it comes into contact with feel slippery
The solution is an acid. Acids burn objects it comes into contact with causing irritation
The solution is a base. Bases burn objects it comes into contact with causing irritation
If a student accidentally should spill an acid on their hand, what step should the teacher take to resolve the issue?
Place hand under warm water
Place a neutral solution on the acidic hand to neutralize the effects
Place a more acidic solution on the acidic hand to enhance the effects
Place a base solution on the acidic hand causing it to neutralize
If a blue litmus paper remains blue, the solution could be (Multiple Answers)
Basic
Neutral
Acidic
Acidic and Basic
If a red litmus paper remains red, the solution could be (Multiple Answers)
Basic
Neutral
Acidic
Acidic and Basic
Which of the following items is the most acidic?
None of the above
Distilled Water
Milk of Magnesia (Laxative)
Lemon Juice
Which of the following items is the most basic?
None of the above
Distilled Water
Milk of Magnesia (Laxative)
Lemon Juice
Blue litmus paper turning red indicates
The solution is confusing
The solution is acidic
The solution is basic
The solution is neutral
Red litmus paper turning blue indicates
The solution is confusing
The solution is acidic
The solution is basic
The solution is neutral
Dawn dish soap is often used to clean up messes. This brand of soap is usually slightly basic. Which pH would best match the soap?
14.0
2.0
8.0
1.0
Stomach acid provides humans the ability to breakdown and digest food for nutrients. Stomach acid usually has a very acidic pH. Which of the following pH rates would be most appropriate for stomach acid?
10.0
1.0
7.0
5.0
a pH of 2.0 would cause a blue litmus paper to turn
yellow
orange
blue
red
a pH of 8.0 would cause a red litmus paper to turn
yellow
orange
blue
red
a pH of 3.0 would cause a blue litmus paper to turn
yellow
orange
blue
red
a pH of 9.0 would cause a red litmus paper to turn
yellow
orange
blue
red
a pH of 9.0 would cause a red litmus paper to turn
No effect
orange
blue
red
How do you neutralize a base?
Add an acid
Add another stronger base
Add a weaker base
add a neutralizer
How do you neutralize a acid?
Add an neutralizer
Add another stronger acid
Add a weaker acid
add a base
Acids tend to:
taste sour and are soap-like
taste bitter and are corrosive
taste sour and are corrosive
taste bitter and are soap-like
Bases tend to:
taste sour and are soap-like
taste bitter and are corrosive
taste sour and are corrosive
taste bitter and are soap-like
Which of the following are bases? (choose all that apply)
Human Blood (pH 8)
Pure Water (pH 7)
Lemon (pH 2)
Sodium Hydroxide (pH 14)
Broccoli (pH 10)
What is another word for an acid?
pH
proton acceptor
proton donor
