
OLIMPIADE SAINS COMPETITION TF8
Quiz
•
Science
•
9th - 12th Grade
•
Practice Problem
•
Hard
DEMA FAKULTAS UIN ARRANIRY
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50 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Suatu sampel Ba(OH)2 sebanyak 25 mL dititrasi oleh 100 mL HCL 0,1 M, tentukan konsentrasi sampel tersebut....
a. 0,9 M
b. 0,2 M
c. 2,5 M
d. 1 M
e. 5 M
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebanyak 0,5 gram sampel KOH (Mr KOH = 56) dilarutkan ke dalam air dan memerlukan 25 mL larutan H2SO4 0,1 M untuk menetralkannya. Maka, kadar KOH dalam larutan tersebut adalah....
a. 50 %
b. 55 %
c. 56 %
d. 60 %
e. 70 %
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Titrasi asam basa merupakan titrasi yang berdasarkan pada reaksi penetralan atau reaksi netralisasi. Oleh karena itu, saat sebanyak 25 mL NaOH 0,5 M dapat dinetralkan oleh HCl 20 mL. Maka, hitunglah molaritas HCl....
a. 0,250 M
b. 0,270 M
c. 0,275 M
d. 0,357 M
e. 0,625 M
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hitunglah pH larutan jika sebanyak 200 ml NaOH 1 M dicampurkan dengan 300 ml NaOH 0,05 M....
a. 11,56
b. 13,63
c. 13,67
d. 23,75
e. 15
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebanyak 50 ml larutan KOH 0,2 N direaksikan dengan 50 ml larutan H2SO4 0,005 M. tentukanlah pH larutan tersebut....
a. 12,70
b. 12,60
c. 12, 77
d. 13,07
e. 33, 3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tentukan pH dari larutan NH4OH 0,4 M (Kb= 10-5)
Diketahui:
NH4OH 0,4 M (Kb= 10-5)
Mb= 0,4 M = 410-1 M
Kb= 10-5
Berapakah Ph larutan NH4OH 0,4 M ....
a. pH = 10 + log 2
b. pH = 11 + log 2
c. pH = 11 + log 3
d. pH = 11 + log 5
e. pH = 12 + log 2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ion X2- merupakan isoelektronik. Coba tentukan konfigurasi elektron dari unsur X tersebut....
a. 1s2
b. 1s22s2
c. 1s22s22p4
d. 1s22s22p6
e. 1s22s22p6 3s2
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