soal semester gasal kimia kelas XII
Quiz
•
Chemistry
•
12th Grade
•
Easy
Siti Afsoh, S.Pd.
Used 21+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tekanan osmotik larutan yang mengandung 9 gram glukosa (Mr = 180) dalam 500 ml larutan pada suhu 27oC( R = 0,082) adalah .....
2,46 atm
4,92 atm
24,6 atm
49,2 atm
98,4 atm
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
suatu larutan urea dalam air mempunyai titik beku - 0,372oC. Jika Kf air = 1,86oC/molal dan Kb air = 0,52oC/molal, maka kenaikan titik didih larutan urea tersebut adalah....
0,372oC
0,104oC
1,04oC
0,892oC
2,60oC
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ke dalam 500 gram air (Ar H =1, O =16) dilarutkan dalam 40 gram senyawa Fe2(SO4)3 (Mr = 400). Jika Kb air 0,52oC/m dan derajat ionisasi = 0,8, maka kenaikan titik didih larutan tersebut adalah ....
0,354oC
0,416oC
0,437oC
0,496oC
0,516oC
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
10 gram suatu lemak dilarutkan dalam 100 gram benzena (kf = 5,1) dan ternyata larutan itu membeku 0,34oC dibawah titik beku benzena murni. Mr lemak tersebut adalah.....
3000
2500
2000
1500
750
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diketahui :
Fe2+ (aq) +2e- Fe(s) Eo = - 0,44 volt
Mg2+ (aq) + 2e- Mg (s) Eo = -2,37 volt
Zn2+ (aq) + 2e- Zn (s) Eo = - 0,76 volt
Cu2+ (aq) + 2e- Cu (s) Eo = + 0,34 volt
Ag+ (aq) + e- Ag(s) Eo = +0,80 volt
Logam-logam yang dapat melindungi besi dari perkaratan dengan cara proteksi katodik adalah.....
Mg dan Cu
Zn dan Cu
Mg dan Ag
Mg dan Zn
Cu dan Ag
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
50 ml larutan Ba(OH)2 0,1 M diperlukan untuk menetralkan hasil elektrolisis LSO4 dengan elektrode Pt. Jika di katode terbentuk 0,325 gram logam L, maka massa atom relatif logam tersebut adalah....
24
40
56
59
65
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dalam sel volta terjadi reaksi :
Sn + 2 Ag+ Sn2+ + 2 Ag Eo Sn = - 0,14 volt dan Eo Ag+ = +0,80 volt harga potensial sel reaksi tersebut adalah .....
1,88 volt
1,74 volt
0,94 volt
0,36 volt
-0,94 volt
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