
KIMIA
Authored by Kelas XI MA Tanwirul Qulub YPPMU .
Chemistry
University
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40 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan reaksi berikut:
I. CO32- + H2O HCO3- + OH-
II. H2CO3 + H2O HCO3- + H3O+
Pernyataan yang benar menurut Bronsted-Lowry kedua reaksi diatas adalah ….
HCO3- berlaku basa pada reaksi I dan basa pada reaksi II
HCO3- berlaku asam pada reaksi I dan asam pada reaksi II
HCO3- berlaku asam pada reaksi I dan basa pada reaksi II
HCO3- berlaku basa pada reaksi I dan asam pada reaksi II
HCO3- merupakan asam yang lebih kuat daripada H2CO3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Spesi berikut ini dapat bertindak sebagai asam maupun basa menurut Bronsted-Lowry, kecuali ….
H2S
NH3
HSO4-
NO3-
H2O
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Besarnya konsentrasi H+ dari 3 gram CH3COOH dalam 100 mL larutan adalah …. (Ka = 1,8 x 10-5, Ar C = 12, H = 1, O = 16)
9 x 10-6 M
3 x 10-6 M
3 x 10-4 M
9 x 10-3 M
3 x 10-3 M
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Gas HCl murni, 24 mL ditiupkan ke dalam 125 mL air sehingga seluruh gas larut dan tidak volume air tidak berubah. Tekanan gas semula 76 cmHg dan t = 27oC. Kalau tetapan gas ideal R = 0,08 L.atm/mol K, log 8 = 0,9, maka pH larutan HCl adalah ….
1,20
1,47
1,80
2,10
2,47
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Suatu basa lemah LOH mempunyai pH = 10 + log 5, Kb LOH = 2,5 x 10-5, maka konsentrasi basa tersebut adalah ….
0,01 M
0,02 M
0,03 M
0,04 M
0,05 M
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Larutan H2SO4 0,01 M akan memberikan warna yang sama dengan larutan HA 0,1 M jika ditetesi indikator yang sama, maka tetapan ionisasi (Ka) HA adalah…..
1 x 10-3
4 x 10-3
4 x 10-2
4 x 10-4
4 x 10-5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Menurut persamaan reaksi:
H2SO4(aq) + 2NaOH(aq) Na2SO4(aq) + 2H2O(l). Bila 75 mL larutan H2SO4 0,1 M dicampur dengan 50 mL larutan NaOH 0,2 M, maka pada reaksi tersebut yang tersisa adalah .... mol
2,5 x 10-3 H2SO4
5 x 10-3 H2SO4
2,5 x 10-3 NaOH
5 x 10-3 NaOH
7,5 x 10-3 NaOH
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