Penilaian Harian Elektrokimia
Quiz
•
Chemistry
•
12th Grade
•
Medium
Ahmad Ubaedah
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 10 pts
Suatu sel volta terdiri dari elektroda Ag yang dicelupkan di dalam larutan Ag+ 1 M dan elektroda Zn yang dicelupkan ke dalam larutan Zn2+ 1 M. bila diketahui:
Ag+ + e → Ag ; E⁰= +0,80 V
Zn2+ + 2e → Zn ; E⁰= - 0,76 V
Maka pernyataan yang salah di bawah ini adalah….
Elektroda Ag bertindak sebagai katoda
Potensial standar sel ialah 2,36 V
Elektroda Zn bertindak sebagai anoda
Reaksi selnya adalah 2Ag+ + Zn → 2Ag + Zn2+
Logam Ag mengendap pada elektroda Ag
2.
FILL IN THE BLANK QUESTION
3 mins • 10 pts
Jika diketahui:
Zn + Cu2+ → Zn2+ + Cu ; E⁰= +1,10 V
Sn2+ + 2e → Sn ; E⁰= - 0,14 V
Cu2+ + 2e → Cu ; E⁰= +0,34 V
Maka potensial standar bagi reaksi Zn + Sn2+→ Zn2+ + Sn adalah…..
3.
MULTIPLE CHOICE QUESTION
2 mins • 10 pts
Pada proses elektrolisis larutan NaCl dengan elektroda karbon, zat yang terjadi pada katoda adalah…
Gas O2
Gas H2
Logam Na
Gas Cl2
NaCl
4.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Manakah zat yang tatkala dielektrolisis dapat menghasilkan gas hydrogen di anoda….
NH4OH (l)
Na2SO4 (aq)
HCl (aq)
KHSO4 (aq)
NaH (l)
5.
MULTIPLE CHOICE QUESTION
2 mins • 10 pts
Pada elektrolisis lelehan NaCl, pada katoda dan anoda dihasilkan…
H2 dan Cl2
H2 dan O2
Na dan H2
Na dan O2
Na dan Cl2
6.
FILL IN THE BLANK QUESTION
5 mins • 10 pts
Berapakah massa logam perak yang diendapkan jika arus Listrik sebesar 5 ampere dialirkan ke dalam larutan AgNO3 selama 2 jam? (Ar Ag = 108) jawaban .....,29 gram
7.
FILL IN THE BLANK QUESTION
30 sec • 10 pts
Katoda pada sel volta berperan sebagai kutub….
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