
PRETEST UKIN
Authored by Lea Pandia
Chemistry
1st Grade - University
Used 2+ times

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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
1. Perhatikan persamaan reaksi berikut :
Al3+ + 3e- → Al E⁰ = -1,66 volt
Zn2+ + 2e- → Zn E⁰ = -0,76 volt
Harga E⁰sel untuk rangkaian sel volta kedua unsur di atas adalah ….
A. +2,42 volt
B. +0,96 volt
C. +0,90 volt
D. -0.90 volt
E. -2,42 volt
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
2. Diketahui sel volta berikut ini :
Zn | Zn2+ || Ag+ | Ag E⁰sel = + 1,56 volt
Ag+ (aq) + e → Ag (s) E⁰ = + 0,80 volt
Maka nilai E⁰ reaksi Zn3+(aq) + 2e → Zn dari reaksi tersebut…
A. +0,76 volt
B. -0,76 volt
C. +1,14 volt
D. -1,14 volt
E. + 2,14 volt
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
3. Mg+2 (aq) + 2e → Mg(s) E⁰ = -2,34 volt
Mn+2 (aq) + 2e → Mn (s) E⁰ = -1,20 volt
Notasi sel untuk reaksi di atas yang benar adalah…
A. Mg+2/Mg//Mn+2/Mn
B. Mn+2/Mn//Mg/Mg+2
C. Mn/Mn+2//Mg+2/Mg
D. Mg/Mg+2//Mn/Mn+2
E. Mn/Mn+2//Mg/Mg+2
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
4. Diketahui potensial elektroda :
Cr3+(aq) + 3e → Cr(s) E° = -0,71 volt
Ag+(s) + e → Ag(s) E° = +0,80 volt
Al3+(aq) + 3e → Al(s) E° = -1,66 volt
Zn3+(aq) + 2e → Zn(s) E° = -0,74 volt
Pt2+(aq) + 2e → Pt(s) E° = +1,50 volt
Mg+2 (aq) + 2e → Mg(s) E⁰ = -2,34 volt
Berdasarkan data tersebut, spesi yang dapat dioksidasi oleh Al adalah …..
A. Logam Cr
B. Logam Ag
C. Logam Mg
D. Logam Zn
E. Logam Pt
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
5. Diketahui potensial reduksi :
Fe2+ + 2e- → Fe E° = -0,44 volt
Pb2+ + 2e- → Pb E° = -0,13 volt
Zn2+ + 2e- → Zn E° = -0,76 volt
Sn2+ + 2e- → Sn E° = -0,14 volt
Berdasarkan data tersebut, reaksi yang tidak dapat berlangsung spontan adalah ....
A. Fe2+ + Zn → Fe + Zn2+
B. Pb2+ + Fe → Pb + Fe2+
C. Sn2+ + Zn → Sn + Zn2+
D. Zn2+ + Pb → Zn + Pb2+
E. Sn2+ + Fe → Sn + Fe2+
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