Name ___________________________________
Acid/Base
1. Which of the following is true for acidic solutions?
A. [H+] = [OH-]
C. [H+] < [OH-]
+
B. [H ] > [OH ]
D. [H+] = 1x 10-14
2. Which term best describes a solution with a pH of 8?
A. Molar
C. Basic
B. Neutral
D. Acidic
3. Which term best describes a solution with a hydrogen ion concentration of 1.0 x10 -7?
A. Acidic
C. Neutral
B. Basic
D. Molar
4. If the hydroxide concentration in a solution is 1.0 x10-11, what term best describes that solution?
A. Acidic
C. Neutral
B. Basic
D. Molar
5. A solution of pH 2 is
A. 10 X less acidic than a solution of pH 3
B. 10 X more acidic than a solution of pH3
C. twice as acidic as a solution of pH 3
D. half as acidic as a solution of pH 3
6. Which relationship correctly describes an acid?
A. the stronger the acid, the closer it is to a base.
B. the stronger the acid, the lower the pH
C. the stronger the acid, the closer it is to pH 7
D. the stronger the acid, the higher the pH
7. A student adds NaOH to HCl in a flask until an indicator shows the point at which the solution is
neutral. When the solution is neutral
A. the volume of base added will equal the starting volume of the acid
B. the concentration of HCl in the flask will equal the starting concentration of NaOH added
C. the mass of NaOH solution added will equal the starting mass of HCl
D. the moles of NaOH added will equal the moles of HCl originally in the flask
8. Hard water deposits around the bathroom sink can be dissolved by acids. Which of the following
solutions would be best for cleaning hard water deposits?
a. Window cleaner with ammonia (pH 10)
b. Soap (ph 9)
c. vitamin C (pH 3)
d. drain cleaner (pH 12)
Use this graph of an acid/base
titration to answer the next
two questions.
end point
starting point
9. According to the graph, when the pH is nearing 12,
A.
B.
C.
D.
the addition of a large volume of base causes a relatively small change in pH
the addition of a small volume of base causes a relatively large change in pH
the addition of a base causes no change in the pH
the addition of a base causes a lowering of the pH
10. The numbers shown below indicate the pH range over which the indicator changes from one
color to another. Which indicator shown below would be best if you wanted to neutralize a HCl
solution using a NaOH solution?
A. Phenolpthalein 8.2—10.0
B. Methyl red
4.4-6.2
C. Bromocresol Green 4.04—5.4
D. Bromothymol blue 6.0—7.6
11. A solution of pH 7 has
a. more H+ than OHb. more OH- than H+
c. the same concentration of H+ and OHd. no H+ and no OH-
12. If 20 ml of 0.1 M HCl is mixed with 10 ml of 0.2 M NaOH, the solution will be
a. acidic
b. basic
c. neutral
13. If 30 ml of 0.1 M HCl is mixed with 20 ml of 0.1 M NaOH, the solution will be
a. Acidic
b. basic
c. neutral
14. How many ml of 0.2 M HCl would be required to neutralize 12 ml of 0.1M NaOH?
15. If it takes 10.0 mL of 0.4 M HCl to neutralize a beaker full of NaOH solution, how
many moles of NaOH were in the beaker?
16. Write a balanced chemical equation for the reaction of HCl with Ca(OH)2.
17. If it takes 30 ml of 0.1 M NaOH to neutralize 15 ml of HCl solution, what was the
concentration (molarity) of the acid?
18. If it takes 10 ml of 1.0 M NaOH to neutralize 10 ml of HCl, what was the
concentration (molarity) of the acid?
19. A buret is filled with a 0.20 M solution of NaOH. 30.0 ml of HCl of unknown molarity are placed in
a flask under the buret and a few drops of bromothymol blue are added to the flask. Before
neutralization the buret reads 6.00 ml. The NaOH is added slowly to the HCl until the solution in the
flask turns green. The buret now reads 36.00 ml. What was the original concentration (molarity) of
the HCl in the flask?
20. Use the information below to determine the narrowest possible pH range for the mystery solution.
Indicator and pH at which color changes
B. Blue 6 (yellow) to 7.6 (blue)
Methyl Orange 3.1 (red) to 4.4 (yellow)
Methyl Red 4.4 (red) to 6.2 (yellow)
Bromcresol Green 4 (yellow) to 5.4 (blue)
Orange IV 1.4 (pink) to 2.6 (yellow)
Phenolthalein 8.2 (clear) to 10 (dark pink)
Alizarin Yellow dark red above a 12
Color of Mystery
Solution
yellow
yellow
orange
Blue-green
yellow
clear
yellow