uh 2 buffer n hidro

Quiz
•
Chemistry
•
11th Grade
•
Hard
Henny Oktarina
Used 7+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
3.Sebanyak 250 mL larutan CH3COOH 0,2 M dicampur dengan 250 mL NaOH 0,2 M, membentuk suatu garam sesuai dengan reaksi :
CH3COOH(aq) + NaOH(aq) ==> CH3COONa(aq) + H2O(l)
(Ka = 1 10-9). pH campuran tersebut adalah . . . .
A. 3
B. 5
C. 9
D. 10
E. 11
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui beberapa senyawa berikut :
1. CaF2
2. Fe(NO3)2
3. K3PO4
4. Al2S3
5. ZnSO4
Berdasarkan data diatas, garam yang memiliki pH < 7 adalah . . ..
1,3
1,2
2,5
3,4
4,5
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Garam berikut yang mengalami hidrolisis sempurna adalah ….
K2CO3
(NH4)2S
Al2(SO4)3
NaCl
CH3COONa
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Bila Ka CH3COOH = 1 x 10–5, maka pH larutan Ba(CH3COO)2 0,1 M adalah ….
1
5 – log 1,4
9
9 – log 1,4
9 + log 1,4
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Larutan 25 mL HCl 0,2 M direaksikan dengan 25 mL NH3 0,2 M sesuai reaksi:
NH3 (aq) + HCl (aq) → NH4Cl (aq)
Harga pH larutan yang terjadi adalah …. (Kb NH3 = 10−5)
7 + log 1
9 + log 1
5 − log 1
13 − log 2
13 + log 2
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Tetapan Hidrolisis NaBrO sebesar ....
(Ka HBrO = 2.10-5)
1x10-15
5x10-10
5x10-15
5x10-6
2x10-5
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jika diketahui pH (NH4)2SO4 = 5, Kb NH4OH = 10-5, dan Mr (NH4)2SO4= 132, massa amonium sulfat yang harus dilarutkan dalam 250 mL air adalah …
A. 0,825
B. 1,650
C. 2,475
D. 3,300
E. 4,125
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