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- 1. Multiple Choice
What is the pH of a 0,10 M HC4H7O2 solution ? The Ka of HC4H7O2 is 1,5 x 10-5
1,0
2,9
4,7
8,5
10,3
- 2. Multiple Choice
Which of the following will be acidic ?
NaOH
NH3
NaCl
NH4Cl
CH3CONH2
- 3. Multiple Choice
Identify the conjugate pairs in the following reaction ?
HCHO2 + CH3NH2 === CHO2- + CH3NH3+
HCHO2 / CH3NH2
HCHO2 / CHO2-
CH3NH2 / CHO2-
CHO2- / CH3NH3+
None of the above are conjugate pairs
- 4. Multiple Choice
What is the conjugate acid of HPO42- ?
H4PO4+
H3PO4
H2PO4-
HPO42-
PO43-
- 5. Multiple Choice
Which of the following is true about an aqueous solution of C5H5NHCl ?
The solution is acidic due to the presence of C5H5NH+
The solution is acidic due to the presence of HCl
The solution is basic due to the presence of Cl-
The solution is basic due to the presence of C5H5N
The solution is neutral because both ions are spectator ions
- 6. Multiple Choice
Berapakah pH sebuah buffer HC2H3O2 dan NaC2H3O2 jika konsentrasi keduanya sama ?
2,31
4,74
5,93
7,08
9,62
- 7. Multiple Choice
Dalam larutan dengan pH = 4,35 berapakah [H+] ?
6,7 x 10-3 M
3,5 x 10-4 M
4,5 x 10-4 M
3,5 x 10-5 M
4,5 x 10-5 M
- 8. Multiple Choice
Berapakah [H+] dalam 0,15 M larutan asam asetat jika Ka = 1,8 x 10-5 ?
1,1 x 10-2 M
1,6 x 10-3 M
1,2 X 10-4 M
1,8 X 10-5 M
2,7 X 10-6 M
- 9. Multiple Choice
Which compound is the strongest acid in aqueus solution ?
HOCN
HOCl
HOClO
HOClO2
HOClO3
- 10. Multiple Choice
What is the pH of a 0,002 M formic acid (HCOOH) solution ? (Ka HCOOH = 1,7 x 10-4)
2,70
3,30
3,60
3,90
4,20
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