PENYANGGA
Quiz
•
Chemistry
•
11th Grade
•
Practice Problem
•
Easy
Pritty Suprihatin
Used 10+ times
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35 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Pasangan reaksi yang menghasilkan campuran penyangga, adalah ….
(Ka CH3COOH=1,75 x 10-5)
50 mL CH3COOH 0,2 M dengan 50 mL larutan NaOH 0,2 M
10 mL CH3COOH 0,1 M dengan 10 mL CH3COONH4 0,05 M
10 mL CH3COOH 0,1 M dengan 10 mL Ca(OH)2 0,05 M
30 mL CH3COOH 0,1 M dengan 40 mL KOH 0,05 M
50 mL CH3COOH 0,05 M dengan 50 mL Ba(OH)2 0,03 M
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Terdapat beberapa larutan berikut:
(1) 25 mL NaOH 0,1 M;
(2) 25 mL HCN 0,2 M;
(3) 25 mL CH3COOH 0,1 M;
(4) 25 mL NH4OH 0,2 M; dan
(5) 25 mL HCl 0,2 M.
Pasangan senyawa yang dapat membentuk larutan penyangga adalah ....
(1) dan (2)
(1) dan (3)
(2) dan (4)
(3) dan (4)
(4) dan (5)
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diberikan campuran dari beberapa larutan sebagai berikut:
(1) 200 mL CH3COOH 0,1 M dan 200 mL NaOH 0,1 M
(2) 200 mL CH3COOH 0,2 M dan 200 mL NaOH 0,1 M
(3) 200 mL NH4OH 0,1 M dan 200 mL HCl 0,1 M
(4) 200 mL NH4OH 0,1 M dan 200 mL HCl 0,05 M
Campuran yang membentuk larutan penyangga adalah...
1, 2, dan 3
1 dan 3
2 dan 4
4
1, 2, 3, dan 4
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Larutan NH4OH 0,2 M (Kb =1,0 x 10-5) yang volumenya 45 mL dicampur dengan larutan (NH4)2SO4 0,05 M. Jika pH larutan setelah pencampuran adalah 9 + log 3, maka volume larutan (NH4)2SO4 adalah …. mL
45
30
25
20
15
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Jika larutan buffer yang mengandung 0,4 mol NH4OH dan 0,2 mol NH4Cl ditambahkan ke dalamnya 100 mL HCl 1M, maka besarnya pH akhir campuran adalah ….(Kb NH4OH=10-5)
5
6 + log 5
8
8 + log 5
9
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Campuran larutan yang tepat untuk mendapatkan larutan penyangga dengan pH = 5, adalah:
10 mL NaOH 0,1 M + 5 mL CH3COOH 0,1 (Ka = 10-5)
10 mL NaOH 0,1 M + 10 mLCH3COOH 0,1 M (Ka = 10-5)
10 mL NaOH 0,1 M + 20 mLCH3COOH 0,1 M (Ka = 10-5)
20 mL NaOH 0,1 M + 20 mLCH3COOH 0,1 M (Ka = 10-5)
20 mL NaOH 0,1 M + 10 mLCH3COOH 0,1 M (Ka = 10-5)
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
200 mL larutan CH3COOH 0,5 M dicampur dengan 100 mL larutan (CH3COO)2Ba 0,2 M. Jika Ka CH3COOH = 1,0 x 10-5, jika campuran ini ditambahkan 20 ml HCl 1 M, maka pH larutan yang terjadi, adalah ….
6
6 – 2 log 5
5 – log 6
5 – log 2
5 – 2 log 5
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