
sel volta kelas XI
Authored by Rizka Noraharja
Chemistry
11th Grade

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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui potensial elektrode :
Cr3+(aq) + 3 e → Cr(s) Eø = - 0,71 volt
Ag+(aq) + e → Ag(s) Eø = + 0,80 volt
Al3+ (aq) + 3 e → Al(s) Eø = - 1,66 volt
Pt2+(aq) + 2 e → Pt(s) Eø = + 1,50 volt
Zn2+(aq) + 2 e → Zn(s) Eø = - 0,74 volt
Reaksi – reaksi berikut berlangsung spontan, kecuali ....
Zn2+(aq) + Pt(s) → Pt2+(aq) + Zn(s)
Cr3+(aq) + Ag(s) → Ag+(aq) + Cr(s)
Al3+(aq) + Cr(s) → Cr3+(aq) + Al(s)
Ag+(aq) + Pt(s) → Pt2+(aq) + Ag(s)
Cr3+(aq) + Al(s) → Al3+(aq) + Cr(s)
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui data potensial standar berikut :
Zn2+(aq) + 2 e → Zn(s) E° = - 0,76 volt
Cu2+(aq) + 2 e → Cu(s) E° = + 0,34 volt
Mg2+(aq) + 2 e → Mg(s) E° = - 2,34 volt
Cr3+(aq) + 2 e → Cr(s) E° = - 0,74 volt
Harga potensial sel yang paling besar terdapat pada ....
Zn/Zn2+(aq)//Cu2+(aq)/Cu
Cr/Cr3+(aq)//Cu2+(aq)/Cu
Zn/Zn2+(aq)//Cr3+(aq)/Cr
Mg/Mg2+(aq)//Cu2+(aq)/Cu
Mg/Mg2+(aq)//Cr3+(aq)/Cr
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Dari data Eo Zn = - 0.76 Volt, dapat dikatakan bahwa dalam keadaan standar
reaksi Zn2+ + 2e → Zn selalu tidak spontan
ion Zn2+adalah oksidator kuat
ion H+ lebih mudah tereduksi daripada ion Zn2+
Zn mempunyai kecenderungan yang besar untuk larut sebagai ion Zn2+
H2 adalah reduktor yang lebih kuat daripada Zn
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Bila diketahui :
Ni + Fe2+ --> Ni2+ + Fe E0 = - 0,19 volt
Al3+ + 3e --> Al E0 = - 1,66 volt
Fe2+ + 2e --> Fe E0 = - 0,44 volt
maka potensial sel standar untuk reaksi:
2 Al + 3 Ni2+ --> 2 Al3+ + 3 Ni, adalah ....
+ 0,91 volt
+ 1,41 volt
+ 2,29 volt
+ 2,57 volt
+ 4,07 volt
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pada reaksi :
Ni(s) + 2AgNO3(aq) --> Ni(NO3)2(aq) + 2Ag(s)
Menurut reaksi diatas bagan sel volta dapat dituliskan dengan ....
Ni | Ni2+ ||Ag+ |Ag
Ag|Ag+ || Ni2+ |Ni
Ni | Ag+ || Ni2+ |Ag
Ag | Ni2+ ||Ag+ |Ni
Ni2+|Ni || Ag | Ag+
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Elektroda Cu bertindak sebagai anoda
Elektroda Cr bertindak sebagai katoda
Logam Cu mengendap di katoda
Diagram selnya adalah Cr3+ / Cr // Cu / Cu2+
Harga E0 sel adalah + 2,50 V
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Ag/Ag+//Ni/Ni2+
Ni/Ni2+//Ag+/Ag
Ni/Ni2+//Ag/Ag+
Ag+/Ag//Ni/Ni2+
Ag/Ag+//Ni2+/Ni
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