Soal Elektrolisis
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Medium
+1
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25 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pada elektrolisis seperti gambar di bawah ini persamaan yang menunjukkan reaksi pada elektroda X adalah ….
H2O(l) -----> 2H+(aq) + ½O2 + 2e–
Cu2+(aq) + 2e– -----> Cu(s)
Cu(s) -----> Cu2+(aq) + 2e–
2H2O(l) + 2e– -----> H2(g) + 2OH–(aq)
2H2O(l) + O2(l) + 4e– -----> 4OH–(aq)
Tags
NGSS.HS-PS1-2
NGSS.HS-PS1-4
NGSS.HS-PS1-7
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Reaksi yang terjadi pada katode dari elektrolisis lelehan Na2SO4 dengan elektroda grafit adalah ….
2H2O(aq) + 2e ------> 2OH–(aq) + H2(g)
2H+(aq) + 2e ------> H2(g)
Na+(l) + e ------> Na(s)
SO42-(aq) + 2e ------> SO4(aq)
4OH–(aq) ------> 2H2O(aq) + O2(g) + 4e
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pada elektrolisis larutan garam logam alkali atau alkali tanah tidak dihasilkan logamnya karena ….
sifat oksidatornya lemah
sifat reduktornya lemah
garam halidanya mempunyai titik leleh tinggi
energi ionisasi tinggi dari logam lain
ion logamnya tidak mengalami reduksi
Tags
NGSS.HS-PS1-2
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Berapakah massa logam perak yang diendapkan jika arus listrik sebesar 5 Ampere dialirkan ke dalam larutan AgNO3 selama 2 jam …. (Ar : Ag = 108)
24,90 gram
29,40 gram
40,29 gram
42,09 gram
49,20 gram
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Elektrolisis yang menghasilkan gas H2 ditunjukkan pada gambar ….
1 dan 2
2 dan 3
3 dan 4
2 dan 4
1 dan 4
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pada reaksi elektrolisis larutan NiSO4 dengan elektroda Ag. Reaksi yang terjadi pada anoda adalah ….
Ni2+(aq) + 2e ------> Ni(s)
Ag(aq) ------> Ag+(aq) + e
Ni(s) ------> Ni2+(aq)+ 2e
2 H2O(l) + 2e ------> H2(g)+ 2 OH–(aq)
2 H2O(l) ------> 4 H+(aq) + O2(g) + 4e
Tags
NGSS.HS-PS1-2
NGSS.HS-PS1-3
NGSS.HS-PS1-7
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Reaksi elektrolisis larutan yang menghasilkan gas H2 di katoda dan O2 di anoda jika menggunakan
elektroda C, kecuali….
larutan NaNO3
larutan K2SO4
larutan MgSO4
larutan Cu(NO3)2
larutan Ca(NO3)2
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