Chem 102 - General Chemistry » Spring 2022 » Quiz 3

Need help with your exam preparation?

Existing Quiz Clients Login here
Question #1
What is the conjugate acid of the H2AsO4- ?
A.   HAsO4
B.   HAsO42-
C.   AsO43-
D.   H3AsO4
E.   H2O
F.   H3AsO42-
Question #2
Which one of the following salts, when dissolved in water, produces the solution with pH less then 7?
A.   CH3NH3I
B.   KF
C.   LiHSO4
D.   NaClO4
Question #3
What is the pH of a solution prepared by diluting 32.84 mL of 0.228 M Ba(OH)2 with enough water to produce a total volume of 100.00 mL? Please express your answer to two decimal places. 
A.   16.89
B.   8.17
C.   13.18 
D.   11.73
Question #4
Benzoic acid (C6H5CO2H = HBz) solutions are sometimes used in organic chemistry experiments has a conjugate base called Benzoate (C6H5CO2- = Bz-). What is the pH of a 0.298 M solution of benzoate (Bz-) if the pKa of Benzoic acid is  (HBz) is 4.19?  (Please keep your answer to two decimal places)
A.   3.17
B.   8.83 
C.   16.71
D.   5.14
Question #5
Solutions of each of the hypothetical acids in the following table are prepared with an initial concentration of 0.100 M. Which of the four solutions will have the highest pOH? Acid pKa HA 4.00 HB 7.00 HC 10.00 HD 11.00
A.   HB
B.   HD
C.   All will have the same strength since the concentration could be the same.
D.   HA
E.   HC

Need help with your exam preparation?

Existing Quiz Clients Login here