
kimia 12
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
LUFFI PRATIWI
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Larutan NaOH 30,0% m/m memiliki massa jenis 1,33 g/mL. Molaritas larutan ini adalah …
8,25 M
16,0 M
33,2 M
64,00 M
9,98 M
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Suatu larutan magnesium klorida 5,10% m/m (Mr = 95,3) memiliki massa jenis 1,17 g/mL. Mol ion Cl¯ yang terkandung dalam 300 mL larutan ini adalah ....
0,368 mol
0,627 mol
0,376 mol
1,47 mol
2,74 mol
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kemolalan suatu larutan 20% massa C2H5OH (Mr = 46) adalah …
0,4 molal
3,4 molal
4,4 molal
5,4 molal
6,4 molal
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Untuk membuat larutan NaOH 2 molal, diperlukan .... (Ar Na=23)
8 gram NaOH dan 92 gram H2O
8 gram NaOH dan 100 gram H2O
10 gram NaOH dan 90 mL H2O
4 gram NaOH dan 100 mL H2O
80 gram NaOH dan 2 liter H2O
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Fraksi mol suatu larutan metanol CH3OH , dalam air 0,50 . konsentrasi metanol dalam larutan dinyatakan dalam persen berat metanol adalah …% ( Ar H =1, C=12, O= 16)
75
64
50
60
80
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nilai faktor van't Hoff untuk larutan 0,1 mol/L kalium nitrat (KNO3) adalah …
lebih kecil 1
tepat sama dengan 1
antara 1 dan 2
tepat sama dengan
nol
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sifat-sifat larutan encer yang mengandung zat terlarut yang sukar menguap antara lain adalah …
I. Penurunan titik didih
II. Tekanan osmotik
III. Tekanan uap
Sifat yang biasanya dihitung dengan menggunakan fraksi mol adalah …
I saja
I dan II
II saja
Il dan III
III saja
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