postest
Quiz
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
Khairurrazak 99
FREE Resource
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6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 20 pts
Apakah benar ilmuwan pertama yang memperkenalkan istilah koloid bernama Thomas Graham (1891)
true
false
Answer explanation
Thomas Graham (1805-1869) adalah ahli kimia Skotlandia, penemu Hukum Graham penemu ilmu kimia koloid, penemu beberapa istilah kimia koloid antara lain seperti koloid, difusi, osmosis, sol, jel, peptisasi, seneresis, kristaloid, dan sebagainya.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apakah saat dilakukan pengadukan antara bubuk susu dan air sifatnya menjadi tidak stabil
true
false
Answer explanation
suatu Sistem koloid bersifat stabil, hal ini disebabkan adanya muatan listrik pada permukaan partikel koloid yang berasal dari zat asing yang teradsorpsi dipermukaan koloid.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apakah benar terjadi pengendapan pada larutan kopi jika didiamkan
true
false
Answer explanation
benar, karena larutan kopi merupakan suspensi kasar yang tidak stabil dan mengendap jika didiamkan.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apakah benar partikel larutan, koloid tidak bisa terlihat dengan kasat mata sedangkan partikel suspensi bisa
true
false
Answer explanation
hal ini dikarenakan ukuran partikel koloid adalah 1-100 nm dan suspensi adalah > 100 nm.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apakah jika suatu koloid di diamkan sifatnya juga bisa menjadi tidak stabil seperti suspensi
true
false
Answer explanation
hal ini dikarenakan koloid memppunyai sifat gerak brown, sehingga koloid menjadi stabil dan tidak mengendap meskipun didiamkan dalam waktu yang sangat lama.
6.
MATCH QUESTION
1 min • 1 pt
jodohkan beberapa istilah dan sifat dari larutan, koloid dan suspensi berikut!
dispersi molekular
homogen
suspensi
larutan
larutan
suspensi
dispersi kasar
dapat disaring
dispersi halus
koloid
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