STS Genap 2024 Kelas XII

Quiz
•
Chemistry
•
12th Grade
•
Hard
Agustina Wada
Used 3+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Diketahui beberapa persaman reaksi berikut :
(1) Na+ + e → Na
(2) Al3+ + 3e → Al
(3) Mg → Mg2+ + 2e (4)
(4) Zn → Zn2+ + 2e
Reaksi oksidasi terdapat pada nomor….
2.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Pada reaksi : 4HCl (aq) + 2S2O32- (aq) → 2S (s) + 2SO2 (g) + 2H2O (l) + 4Cl- (aq)
Bilangan oksidasi S berubah dari ….
3.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Pada persamaan oksidasi reduksi berikut Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) Pernyataan yang tepat berdasarkan reaksi di atas adalah....
Yang bertindak sebagai oksidator adalah Fe2O3
Yang bertindak sebagai reduktor adalah CO2
4.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Diketahui reaksi redoks berikut : Cr2O72- + Cu+ → Cr3+ + Cu2+ Setelah reaksi disetarakan dalam suasana asam dengan metode setengah reaksi, maka persamaan reaksi setaranya adalah….
Cr2O72- + 14H+ + 6Cu+ → 2Cr3+ + 7H2O + 6Cu2+
2Cr2O72- + 14H+ + 6Cu+ → 2Cr3+ + 7H2O + 6Cu2+
Cr2O72- + 7H+ + 6Cu+ → 2Cr3+ + 7H2O + 6Cu2+
Cr2O72- + 14OH- + 6Cu+ → 2Cr3+ + 7H2O + 6Cu2+
5.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
6.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Perhatikan rangkaian sel Volta berikut!
Jika: Zn2+/Zn Eo= –0,76Volt
Cu2+ / Cu Eo= +0,34 Volt
Maka besarnya potensial sel (Esel) Volta tersebut adalah ....
7.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Berdasarkan data berikut: Fe2+ + 2e → Fe, E° = -0,44 V Pb2+ + 2e → Pb, E° = -0,13 V Zn2+ + 2e → Zn, E° = -0,76 V Sn2+ + 2e → Sn, E° = -0,14 V Reaksi yang tidak dapat berlangsung spontan adalah….
Sn / Sn2+ // Pb2+ / Pb
Zn / Zn2+ // Sn2+ / Sn
Pb / Pb2+ // Zn2+ / Zn
Fe / Fe2+ // Pb2+ / Pb
Zn / Zn2+ // Fe2+ / Fe
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