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Chemistry 12: College Preparation Unit 4 Self Quiz - 4.7 - 4.13



Modified True/False
Indicate whether the sentence or statement is true or false.  If false, change the identified word or phrase to make the sentence or statement true.
 

 1. 

According to Arrhenius, acids produce hydrogen ions when dissolved in water. ____________________

 

 2. 

A weak acid is a dilute solution. ____________________

 

 3. 

The concentration of an acid or a base is usually expressed as mol/L. ____________________

 

 4. 

The pH scale measures only the acidity of a solution. ____________________

 

 5. 

A titration is a lab procedure that involves the dilution of an acidic or basic solution. ____________________________________________________________

 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 6. 

A solution with a precise concentration is called a
a.
standard solution
c.
chemical solution
b.
dilute solution
d.
concentrated solution
 

 7. 

Which piece of laboratory equipment is used to transfer a small, accurately known volume of liquid from a commercial solution?
a.
graduated cylinder
c.
burette
b.
pipette
d.
beaker
 

 8. 

To safely dilute concentrated acids, you should always add
a.
a small volume of acid to a large volume of water
b.
a tiny volume of water to the acid
c.
a large volume of acid to a small volume of water
d.
a 50–50 mixture of acid and water
 

 9. 

Why is nitric acid classified as a strong acid?
a.
It has a high electrical conductivity.
b.
It ionizes about 50%.
c.
It ionizes more than 99%.
d.
It has a high electrical conductivity, and it ionizes more than 99%.
 

 10. 

For a neutral solution, which of the following statements is true?
a.
The concentration of hydrogen ions, [H+], equals 1 ´ 10–7 mol/L.
b.
The pH of a neutral solution is 7. 0.
c.
The concentration of hydrogen ions, [H+], equals the concentration of hydroxide ions, [OH].
d.
all of the above
 

 11. 

An acid has a pH of 4. If water is added to the acid to dilute it, what will occur?
a.
The pH will decrease.
c.
The pH will not change.
b.
The pH will increase.
d.
none of the above
 

 12. 

An acid solution, such as vinegar,
a.
turns red litmus paper blue
c.
has a bitter taste
b.
turns blue litmus paper red
d.
feels slippery
 

 13. 

How much more acidic is vinegar (pH = 2) than coffee (pH = 5)?
a.
3. 0
c.
100
b.
1000
d.
2. 5
 

 14. 

Which of the following is an application of a titration?
a.
determining the concentration of acetic acid in vinegar
b.
determining the concentration of acid in a commercial rust remover
c.
performing a laboratory acid–base neutralization
d.
all of the above
 

Completion
Complete each sentence or statement.
 

 15. 

When an acidic solution is diluted, the pH ____________________. When a basic solution is diluted, the pH ____________________.
 

 

 16. 

Hydrochloric acid is added to several small pieces of zinc in a test tube. When a lighted splint is brought to the mouth of the test tube, it ____________________. The gas produced is ____________________.
 

 

 17. 

Hydrochloric acid is added to sodium hydrogen carbonate (baking soda) in a test tube. When drops of limewater are placed near the top of the test tube, they turn ____________________. The gas produced is ____________________.
 

 

 18. 

An oxide that is soluble in water and causes blue litmus to turn red is ____________________. An oxide that is soluble in water and causes red litmus to turn blue is ____________________.
 

 

 19. 

The ____________________ ion is responsible for the properties of an acid. The ____________________ ion is responsible for the properties of a base.
 

 

 20. 

An acid and a base react with one another in a(n) ____________________ reaction to produce a(n) ____________________ and ____________________.
 

 



 
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