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On Level Unit 9 Test Version B

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

 1. 
The equation below shows ammonia dissolving in water.
NH3 (aq) + H2O (l) D NH4+(aq) + OH-(aq)
Why is water considered an acid when ammonia is dissolved in it?
a.
Water has a 2:1 ratio of hydrogen to oxygen.
b.
Water acts as a proton (H+) donor.
c.
Water acts as a proton (H+) acceptor.
d.
Water contains hydrogen atoms.
 

 2. 
A solution contains a hydroxide ion concentration 4.6 x 10-8 M.  What is the hydrogen ion concentration in this solution?
a.
2.2 x 10-1 M
c.
1.6 x 10-7 M
b.
2.2 x 10-7 M
d.
4.6 x 10-7 M
 

 3. 
In the reaction
HSO4-(aq) + H2O (l) D  H3O+(aq) + SO42-(aq),
an acid- conjugate base pair is
a.
HSO4-(aq) and H2O(l)
c.
SO42-(aq) and H3O+(aq)
b.
HSO4-(aq) and SO42-(aq)
d.
SO42-(aq) and H2O(l)
 

 4. 
What is the pH of a 1.0 x 10-5 M HCl solution?
a.
5
c.
-1
b.
1
d.
-5
 

 5. 
How many moles of H2SO4 are needed to prepare 5.0 liters of a 2.0 M solution of H2SO4
a.
5.0 mol
c.
10 mol
b.
2.5 mol
d.
20 mol
 

 6. 
Consider the picture below:
mc006-1.jpg
Which statement accurately describes the picture?
a.
A would be considered the solvent because it is getting dissolved by B.
b.
A would be considered the solute because it is getting dissolved by B.
c.
B would be the solution because it is getting dissolved.
d.
B would be considered the solute because it is getting dissolved by A.
 

 7. 
Which of the following would be considered an Arrhenius Base?
a.
HI
c.
NaOH
b.
H2SO4
d.
NH3
 

 8. 
The covalent bond between H and O in a water molecule are polar because
a.
O is more electronegative that H
c.
water molecules are cohesive
b.
O and H are equally electronegative
d.
H is more electronegative than O
 

 9. 
Hydrochloric acid is a strong, highly corrosive acid.  What is the pOH of a 0.037500 M HCl solution?
a.
12.270
c.
1.733
b.
1.433
d.
12.574
 

 10. 
What is the formula for the following name:  Sulfous Acid
a.
HI
c.
H2SO4
b.
H2SO3
d.
H2S
 

 11. 
Matt is testing whether ammonia and vinegar are acids or bases.  Litmus paper helps determine whether a chemical is an acid or a base.  A drop of ammonia turns the litmus paper blue, and a drop of vinegar turns the litmus paper red.
mc011-1.jpg
What can be deduced from Matt’s experiment? 
a.
Both of the chemicals are bases.
b.
Ammonia is a base, and vinegar is an acid.
c.
Ammonia is an acid, and vinegar is a base.
d.
Both of the chemicals are acids.
 

 12. 
What is the pH of a solution whose hydroxide ion concentration, [OH-], is 1.0 x 10-3 M?
a.
11
c.
3
b.
1
d.
10
 

 13. 
A solution contains an equal amount of hydrogen ion and hydroxide ions.  This solution would be considered?
a.
acidic solution
c.
saline solution
b.
neutral solution
d.
basic solution
 

 14. 
What is the conjugate base of the acid H3PO4?
H3PO4 (aq)  + H2O (l)  D H3O+ (aq)  + H2PO4-1(aq)
a.
OH-1
c.
H2O (l)
b.
H2PO4-1(aq)
d.
H3O+  (aq)
 

 15. 
Which of the following would represent the reaction the occurs between hydrobromic acid and potassium hydroxide?
a.
HBr + KOH " KBr + H2O
c.
KBr + H2O " HBr + KOH
b.
HBr + H2O " KBr + KOH
d.
KOH + H2O " KBr + HBr
 

 16. 
Cameron neutralized a solution of HCl with a solution of NaOH. What would be best to add to this reaction to determine when HCl was completely neutralized by NaOH?
a.
A Base
c.
An Indicator
b.
Deionized water
d.
An acid
 

 17. 
Which statement below best descibes what happens when sodium chloride, NaCl, is dissolved in water?
a.
The NaCl separates into Na+ and Cl- ions.
b.
The NaCl separates into uncharged Na and Cl.
c.
The NaCl reacts with water to form NaH and HCl.
d.
The NaCl react with water to form NaOH and Cl2.
 

 18. 
How many milliliters of 18.4 M H2SO4 are needed to prepare 600.0 mL of a 0.10 M H2SO4 solution?
a.
7.5 mL
c.
4.0 mL
b.
4.6 mL
d.
3.3 mL
 

 19. 
A substance has a hydroxide concentration of 0.00761 M.  This solution would be considered a
a.
basic
c.
saline
b.
neutral
d.
acidic
 

 20. 
An unknown substance dissolves readily in water but not in benzene (a nonpolar solvent).  Molecules of what type are present in the unknown substance?
a.
neither polar nor nonpolar
c.
polar
b.
Both polar and nonpolar
d.
nonpolar
 

 21. 
A solution is made in the below test tube by adding solute particles until no more will dissolve after stirring.  What will happen if more solute is added to the solution?
mc021-1.jpg
a.
The additional solute will settle to the bottom of the container because the solution is saturated.
b.
The entire container will become solid because the solution is supersaturated.
c.
The solute will begin to dissolve because the solution is unsaturated.
d.
The solution will become supersaturated.
 

 22. 
The pH of milk is 6.4.  Based on this information, which of the following statements best describes milk?
a.
It is very acidic.
c.
It is very basic.
b.
It is slightly acidic.
d.
It is slightly basic.
 

 23. 
Which equation represents a neutralization reaction?
a.
H2SO4(aq) +2NaOH(aq)"Na2SO4(aq)+2H2O(l)
b.
2H2(g) + O2(g) " 2H2O(l)
c.
H2CO3(aq)  " CO2(g) + H2O(l)
d.
2Al(OH)3(s) " Al2O3(s) + 3H2O(l)
 

 24. 
What is the pH of 0.300 M of NaOH?
a.
13.5
c.
6.50
b.
8.90
d.
7.5
 

 25. 
The picture below depicts an unknown  substance. 
mc025-1.jpg
The unknown substance
a.
remains unknown because there is not enough information.
b.
must be a strong electrolyte.
c.
must be a non-electrolyte.
d.
must be a weak electrolyte.
 

 26. 
A solution is always
a.
heterogeneous.
c.
homogeneous.
b.
composed of only two phases.
d.
in the liquid phase.
 

 27. 

mc027-1.jpg
A glass of cola was spilled on the carpet.  Most colas are acidic with a pH usually between 2.  Based on the pH shown above, which of the following substances could best be used to neutralize the spilled cola?
a.
Pure Water
c.
Ammonia
b.
Lemon Juice
d.
Baking Soda
 

 28. 
What is the formula for phosphoric acid?
a.
H3P
b.
HPOmc028-1.jpg
c.
HPOmc028-2.jpg
d.
Hmc028-3.jpgPOmc028-4.jpg
 

 29. 
Of the four different laboratory solutions, which would exhibit the most acidic behavior?
a.
pH = 7
c.
pH = 11
b.
pH = 3
d.
pH = 5
 

 30. 
A stock solution of NaOH is found to have a pH of 10.0.  What is the [H+] for the solution?
a.
5.0 x 10-2
c.
1.0 x 10-10
b.
2.5 x 10-3
d.
1.0 x 1010
 

 31. 
Determine the molarity of a solution containing 6.76 g BaCl2 in 750.0 mL of solution.
a.
0.0244 M
c.
0.0325 M
b.
0.00901 M
d.
0.0433 M
 

 32. 
What is the name for the following:  HNO3
a.
Hydronitrate Acid
c.
Nitrous Acid
b.
Hydronitric Acid
d.
Nitric Acid
 



 
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