Larutan dengan pH= 12 dibuat dengan melarutkan x gram NaOH (Mr = 40) dalam air sampai 500 mL. Besarnya x adalah...
Ulangan Harian Kimia

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Other
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11th Grade
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Medium
Ramlan S.Pd,M.Si
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20 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
4,0
2,0
1,0
0,4
0,2
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Agar 10 kg air tidak membeku pada suhu 5°C, perlu ditambahkan NaCl. Jika diketahui Kb air = 1,86 dan Ar H= 1; O= 16; Na= 23; Cl = 35,5 maka pernyataan yang benar, kecuali ...
Diperlukan NaCl lebih dari 786 gram
Larutan NaCl adalah elektrolit kuat
Bentuk molekul air tetrahedral
NaCl dapat terionisasi sempurna
Dalam air terdapat ikatan hidrogen
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Suatu zat nonelektrolit (Mr = 20) sebanyak 15 gram dilarutkan dalam 500 gram air mempunyai titik beku -1,5°C. Zat tersebut harus dilarutkan ke dalam 1 kg air agar diperoleh larutan dengan penurunan titik beku setengahnya adalah sebanyak...
10 gram
15 gram
20 gram
25 gram
30 gram
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Suatu zat organik tersusun dari 37,5% C; 12,5% H dan sisanya oksigen Ar C = 12; H = 1; O = 16). Jika 3,2 gram zat itu dilarutkan dalam 50 gram air (Kf = 1,86 der/m larutan membeku pada suhu -3,72°C. Rumus molekul zat organik tersebut adalah...
CH3OH
C2H8O 2
C3H6O3
C2H6O3
C6H12O6
5.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Larutan elektrolit meliputi
6.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Golongan asam yang termasuk elektrolit kuat pada unsur halogen adalah...
7.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Larutan yang harga pH nya tidak mudah berubah dengan penambahan sedikit asam dan sedikit basa atau pengenceran disebut
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