______� pts. out of 100 possible pts. = ���������� % =������������������������������������������ Name:

 

Advanced Chemistry:� Test #7� (Acid/Base Chemistry)

 

Multiple Choice:���� Circle the letter of the best answer for each of the following.  (2 pts. each)

 

1.���� Which of the choices shown below is the conjugate base of a bicarbonate ion?�

��

  1. OH
  2. H2CO3
  3. Na+
  4. CO3-2
  5. None of the above; the bicarbonate ion cannot have a conjugate base�

2.���� What is the pH of a 0.1 molar solution of NH4OH?�

�����

������ a.� 1�

b.� between 1 and 7

������ c.� 7

������ d.� between 7 and 13

������ e.� 13

 

3.���� What is the pH of a 0.1 molar solution of C2H5OH?�

�����

a.� 1

������ b.� between 1 and 7

������ c.� 7

������ d.� between 7 and 13

������ e.� 13

 

4.���� What is the pH of 0.1 molar KOH?�

�����

a.� 1

������ b.� between 1 and 7

������ c.� 7

������ d.� between 7 and 13

������ e.� 13

 

5.���� What is the pH of 0.1 molar NaBr?�

����

������ a.� 1

������ b.� between 1 and 7

������ c.� 7

������ d.� between 7 and 13

������ e.� 13

6.���� What is the pH of 0.1 molar NaF?�

�����

a.� 1

������ b.� between 1 and 7

������ c.� 7

������ d.� between 7 and 13

������ e.� 13

 

7.���� What is the pH of 0.1 molar HCOOH?�

�����

a.� 1

������ b.� between 1 and 7

������ c.� 7

������ d.� between 7 and 13

������ e.� 13

 

8.���� What is the pH of 0.1 molar HF?�

�����

a.� 1

������ b.� between 1 and 7

������ c.� 7

������ d.� between 7 and 13

������ e.� 13

 

9.���� What is the pH of 1.00 molar HCl?�

�����

a.� -1

������ b.� 0

������ c.� 1

������ d.� between 1 and 7

������ e.� 7

 

10.�� What is the pH of 0.10 molar HCl?�

�����

a.� -1

������ b.� 0

������ c.� 1

������ d.� between 1 and 7

������ e.� 7

��

11.�� When carbon dioxide reacts with water it forms a weakly acidic solution.� The pH of that solution might be:��

��

a.� -1

������ b.� 6

������ c.� 7

������ d.� 8

������ e.� 14

 

12.�� A difference of how many pH unit(s) makes a one hundred fold difference in the hydrogen ion concentration?�

��

a.� 0.01

������ b.� 0.1

������ c.� 1

������ d.� 2

������ e.� 100

 

 

 

 

 

 

13.���� Complete the following acid/base reactions:� (3 pts. each)

 

���������������� a.���� CO3-2 + HS

 

 

  1. CH3COOH + BO3-3

 

 

14.���� Circle the conjugate base in each of the above reactions.� (4 pts.)

 

  1. Identify each of the following as a strong acid (SA), a weak acid (WA), a strong base (SB), a weak base (WB), or neutral (N):�� (2 pt. each)

 

������ a. HBr ���������� ������ b. LiOH �������� ������ c. CH3OH ����������� ������ d. NH4OH ______

 

������ e. KCl ���������� ������ f. CHOOH ������������������ ������ g. H2SO4 ������������� ������ h. HNO2 ______

 

16.���� Write the formula for a hydronium ion.� (2 pt.)

 

 

17.���� If a solution with a [H+] = 1.0 x 10-10 M were tested with litmus paper and phenolphthalein, what would the tests show?� (2 pt. each)

 

����������������������� Litmus = ������������������������������������ Phenolphthalein =

 

  1. List the following acids from strongest to weakest: phosphoric acid (H3PO4), sulfurous acid (H2SO3), hydrobromic acid (HBr), and hydroflouric acid (HF).� (3 pts.)

 

 

 

 

19.���� What is the pH of a 0.050M solution of KOH?� (3 pts.)

 

 

 

 

 

 

 

 

 

 

 

20.���� What is the pH of a 0.0020M solution of HNO3?� (3 pts.)

 

 

 

 

 

 

 

 

 

 

21.���� What is the pH of a 1.0M solution of NaCl?� (3 pts.)

 

 

 

 

 

 

 

 

 

 

 

  1. 45.7 ml of a 0.30M H2SO4 solution is required to neutralize 13.5 ml of a sodium hydroxide solution.� What is the concentration of the NaOH solution?�� (5 pts.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. What is the pH of a solution that has been made by dissolving 4.0 g of NaOH into 100.0 ml of distilled water?� (5 pts.)

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. What is the hydroxide ion concentration in a solution with a pH of 2.0?� (4 pts.)

 

 

 

 

 

 

 

 

 

  1. A 0.00150 M solution of Westtownous acid (WtH) has a pH of 6.5.� What is the acidity constant for Westtownous acid?� (10 pts.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. What is the pH of 0.250 M NaBrO (sodium hypobromite)?� (8 pts.)