
UTBK Kimia
Authored by alvi aprisky
Chemistry
10th - 12th Grade
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6 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pernyataan yang benar tentang HF, HCl, dan HBr adalah ….
HF merupakan asam terkuat karena keelektronegatifan F paling tinggi
titik didih HF tertinggi karena antarmolekulnya terjadi ikatan hidrogen
HBr merupakan asam terlemah karena ikatan H-Br paling lemah
NaF garam paling basa karena Kb F paling besar
HF merupakan asam terlemah karena paling mudah melepas proton
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Ada reaksi berikut (kondisi asam):
KIO3(aq) + KI(aq) -> I2(aq) + K+(aq)
Jika mol kalium iodat (V) yang diperlukan adalah 1.5 mol, berapakah mol iodine yang dihasilkan?
1.5 mol
3 mol
4.5 mol
6 mol
9 mol
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Dietilamina, (C2H5)2NH, merupakan basa lemah dengan kb = 9x10-4. Sebanyak 50 mL larutan dietilamina 0,04 M dititrasi dengan larutan HCl 0,02 M. Jika penambahan HCl adalah 50 mL, pH yang terbentuk adalah ….
4-log 3
4+2log 3
10-2log 3
10+log 3
10+2log 3
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Nilai potensial reduksi beberapa ion diberikan di bawah ini.
Cu2+(aq) + 2e- -> Cu(s) Eo = +0,340V
2H+(aq) + 2e- -> H2(g) Eo = 0,000V
Pb2+(aq) + 2e- -> Pb(s) Eo = -0,126V
Fe2+(aq) + 2e- -> Fe(s) Eo = -0,830V
Manakah yang menghasilkan Eosel terbesar?
Fe2+(aq) + Cu(s) -> Fe(s) + Cu2+(aq)
2H+(aq) + Pb(s) -> H2(g) + Pb2+(aq)
Cu2+(aq) + H2(g) -> Cu(s) + 2H+(aq)
Cu2+(aq) + Pb(s) -> Cu(s) + Pb2+(aq)
Pb2+(aq) + Fe(s) -> Pb(s) + Fe2+(aq)
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Cairan pendingin untuk mesin mobil dibuat dengan cara melarutkan 32 mol suatu senyawa antibeku ke dalam 5 Kg air C/molal pada tekanan udara 1 atm. Larutan ini membeku pada . Pernyataan berikut benar adalah….
(1) Tekanan uap cairan pendingin lebih rendah daripada tekanan uap air murni
(2) Konsentrasi cairan pendingin tersebut adalah 6,4 molal
(3) Cairan murni zat antibeku tersebut tidak menghantarkan listrik
(4) Titik didih cairan pendingin lebih rendah daripada titik didih air murni
Pernyataan 1,2, dan 3 benar.
Pernyataan 1 dan 3 benar.
Pernyataan 2 dan 4 benar.
Pernyataan 4 saja yang benar.
Semua pernyataan benar
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Suatu senyawa X (Mr = 100) yang tidak dapat menghantarkan arus listrik dilarutkan dalam 250 g benzena ternyata memberikan penurunan titik beku sebesar . Jika diketahui harga Kb benzena = C/m, maka berat senyawa yang dilarutkan adalah…
0,5 gram
2,5 gram
5,0 gram
7,5 gram
10 gram
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