UJIAN STS GANJIL KELAS XII.F TA.24-25
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Easy
KHAIRUN NISA
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15 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
NH4+ : Reduksi karena penambahan atom O dan O2 oksidasi karena penangkapan atom O
NH4+ : Oksidasi karena pelepasan atom H dan O2 reduksi karena pelepasan atom O
NH4+ dan O2 terjadi reaksi redoks karena pelepasan dan penangkapan H dan O
NH4+ dan O2 terjadi reaksi reduksi karena sama-sama pelepasan unsur
Oksidasi/reduktor NH4+ dan reduksi/oksidator pada O2
2.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
10
8
6
3
2
3.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
Air garam – air suling – air sabun
Air suling – air garam – air sabun
Air sabun – air suling – air garam
Air sabun – air garam – air suling
Air suling – air sabun – air garam
4.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
Untuk melapisi kunci besi dengan menggunakan logam tembaga dilakukan secara elektrolisis. Hal ini sesuai dengan penggunaan pemurnian tembaga pada industri. Dimana pemurnian tembaga tersebut dilakukan dengan elektrolisis larutan CuSO4, yaitu logam tembaga yang tidak murni dijadikan anoda dan katodanya tembaga murni. Maka dari itu kunci besi yang dilapisi akan berada di katoda dan logam tembaga tersebut yang ada di anoda mengalami oksidasi dan melarut sebagai ion Cu2+. Selanjutnya, ion Cu2+ tersebut akan bergerak menuju katoda dan mengedap di katoda sebagai pelapisan logam tembaga pada kunci besi. Berdasarkan pernyataan tersebut, rangkaian prosedur pelapisan kunci besi dengan logam tembaga di tunjukkan oleh gambar….
5.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
6.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
katoda terjadi reaksi oksidasi dan anoda reaksi reduksi
ion negatif di grafit menuju ke logam Cu
Kutub Katoda bermuatan + dan kutub anoda bermuatan -
7.
MULTIPLE SELECT QUESTION
5 mins • 5 pts
Berdasarkan perpindahan elektronnya, reaksi oksidator ditunjukkan oleh reaksi….
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