College Chemistry Ii Phs 1035 Practice Exam 3 With Answer Key Page 10
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3951) The conjugate base of H 2 PO 4 - is ________.
51)
A) PO 4 3-
B) H 2 PO 4
C) H 3 PO 4
D) HPO 4 2-
E) none of the above
52) The conjugate acid of HSO 4 - is ________.
52)
A) SO 4 2-
C) HSO 4 +
D) H +
E) HSO 3 +
B) H 2 SO 4
53) The conjugate acid of CH 3 NH 2 is ________.
53)
A) CH 3 NH 2
B) CH 3 NH 3 +
C) CH 3 NH 2 +
D) CH 3 NH +
E) none of the above
54) What is the conjugate base of OH - ?
54)
D) O 2-
B) O -
E) H 3 O +
A) O 2
C) H 2 O
55) What is the pH of an aqueous solution at 25.0 °C that contains 3.98 × 10 -9 M hydronium ion?
55)
A) 8.400
B) 5.600
C) 9.000
D) 3.980
E) 7.000
56) What is the pOH of an aqueous solution at 25.0 °C that contains 3.98 × 10 -9 M hydronium ion?
56)
A) 8.400
B) 5.600
C) 9.000
D) 3.980
E) 7.000
57) What is the pH of an aqueous solution at 25.0 °C that contains 3.98 × 10 -9 M hydroxide ion?
57)
A) 8.40
B) 5.60
C) 9.00
D) 3.98
E) 7.00
58) What is the pOH of an aqueous solution at 25.0 °C that contains 3.98 × 10 -9 M hydroxide ion?
58)
A) 8.40
B) 5.60
C) 9.00
D) 3.98
E) 7.00
59) Calculate the pOH of a solution at 25.0 °C that contains 1.94 × 10 -10 M hydronium ions.
59)
A) 1.94
B) 4.29
C) 7.00
D) 14.0
E) 9.71
60) Calculate the pH of a solution at 25.0 °C that contains 1.94 × 10 -10 M hydronium ions.
60)
A) 1.94
B) 4.29
C) 7.00
D) 14.0
E) 9.71
61) Calculate the concentration (in M) of hydronium ions in a solution at 25.0 °C with a pOH of 4.223.
61)
A) 5.98 × 10 -5
B) 1.67 × 10 -10
C) 1.67 × 10 4
D) 5.99 × 10 -19
E) 1.00 × 10 -7
10
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