Fraksi mol urea CO(NH2)2 dalam larutan yang mengandung 10% massa urea dalam air adalah... ( Ar.C = 12, O = 16, N = 14, H = 1 )
Ulangan Harian Koligatif

Quiz
•
Chemistry
•
9th - 12th Grade
•
Hard
Rajamuddin Sidabalok
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
1/6
30/31
1/2
1/31
5/31
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan beberapa gambar molekul partikel tak sebenarnya antara zat terlarut dan zat pelarut dalam larutan berikut.
Larutan yang mempunyai tekanan uap larutan paling besar adalah gambar nomor...
(1)
(2)
(3)
(4)
(5)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebanyak 55,5 gram CaCl2 ( Mr. = 111 gram/mol ) dilarutkan dalam 500 gram air dan mengalami ionisasi sempurna. Jika Kf air = 1,86∘C/m, maka larutan tersebut akan membeku pada suhu...∘C
-5,58∘C
-1,86∘C
-0,465∘C
-0,372∘C
-0,186∘C
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berikut adalah contoh dari peristiwa beberapa sifat koligatif dalam kehidupan sehari-hari yang dapat kita temui :
* pembuatan es krim yang lembut
* pengawetan makanan dengan pengasinan dan pengeringan
Sifat koligatif yang terdapat dalam contoh tersebut secara berurutan adalah...
penurunan tekanan uap jenuh dan penurunan titik beku
penurunan tekanan uap jenuh dan tekanan osmosis
tekanan osmosis dan penurunan tekanan uap jenuh
penurunan titik beku dan tekanan osmosi
tekanan osmosis dan tekanan titik beku
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebanyak 7,2 gram glokosa ( Mr = 180 gram/mol) dilarutkan dalam air sampai volumenya 400 mL. Pada temperatur 27οC tekanan osmosis larutan tersebut adalah... ( R = 0,08 L atm/mol K )
0,04 atm
0,82 atm
2,46 atm
3,18 atm
6,24 atm
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Massa kristal KI yang harus dilarutkan dalam 180 gram air agar zat terlarut tersebut mempunyai fraksi mol sebesar 0,005 adalah...( Ar. H = 1 gram/mol, O = 16 gram/mol. K = 39 gram/mol, I = 127 gram/mol )
16,60 gram
8,30 gram
4,15 gram
3,32 gram
1,66 gram
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Suatu formalin mempunyai kadar 20%. Jika rumus formalin adalah CH2O, molalitas larutan tersebut sebesar ( Ar.C = 12 gram/mol, H = 1 gram/mol, O = 16 gram/mol )
8,33
4,17
2,33
0,83
0,42
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