Pertanyaan

Di laboratorium tersedia logam aluminium, timah, seng, rembaga, dan perak. Diketahui data potensial reduksi logam-logam tersebut sebagai berikut. 1 ) Al 3 + ( a q ) + 3 e − → Al ( s ) E ∘ = − 1 , 66 V 2 ) Sn 2 + ( a q ) + 2 e − → Sn ( s ) E ∘ = − 0 , 14 V 3 ) Zn 2 + ( a q ) + 2 e − → Zn ( s ) E ∘ = − 0 , 76 V 4 ) Cu 2 + ( a q ) + 2 e − → Cu ( s ) E ∘ = + 0 , 34 V 5 ) Ag + ( a q ) + e − → Ag ( s ) E ∘ = + 0 , 84 V Pasangan logam yang dapat digunakan untuk membuat sel Volta dengan reaksi spontan ditulis dalam notasi sel ...

Di laboratorium tersedia logam aluminium, timah, seng, rembaga, dan perak.

Diketahui data potensial reduksi logam-logam tersebut sebagai berikut.

$1) Al^{3 +} (a q) + 3 e^{-} \to Al (s) E^{\circ} = - 1, 66 V 2) Sn^{2 +} (a q) + 2 e^{-} \to Sn (s) E^{\circ} = - 0, 14 V 3) Zn^{2 +} (a q) + 2 e^{-} \to Zn (s) E^{\circ} = - 0, 76 V 4) Cu^{2 +} (a q) + 2 e^{-} \to Cu (s) E^{\circ} = + 0, 34 V 5) Ag^{+} (a q) + e^{-} \to Ag (s) E^{\circ} = + 0, 84 V$

Pasangan logam yang dapat digunakan untuk membuat sel Volta dengan reaksi spontan ditulis dalam notasi sel ...

S. Lubis

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang benar sesuai notasi sel diatas.

Pembahasan

Reaksi spontan memiliki nilai , sehingga pasangan logam yang tepat yaitu: Pasangan Al dan Sn Pasangan Al dan Zn Pasangan Al dan Cu Pasangan Al dan Ag Pasangan Sn dan Zn Pasangan Sn dan Cu Pasangan Sn dan Ag Pasangan Zn dan Cu Pasangan Zn dan Ag Pasangan Cu dan Ag Jadi, jawaban yang benar sesuai notasi sel diatas.

Reaksi spontan memiliki nilai italic E degree subscript sel greater than 0 , sehingga pasangan logam yang tepat yaitu:

Pasangan Al dan Sn

Al space I space Al to the power of 3 plus sign space parallel to space Sn to the power of 2 plus sign space I space Sn space space italic E degree subscript sel equals 1 comma 52 space V

Pasangan Al dan Zn

Al space I space Al to the power of 3 plus sign space parallel to space Zn to the power of 2 plus sign space I space Zn space space italic E degree subscript sel equals 0 comma 90 space V

Pasangan Al dan Cu

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree subscript sel end cell equals cell italic E degree subscript katode minus sign italic E degree subscript anode end cell row blank equals cell 0 comma 34 minus sign left parenthesis minus sign 1 comma 66 right parenthesis end cell row blank equals cell 2 comma 00 space V end cell end table

Al space I space Al to the power of 3 plus sign space parallel to space Cu to the power of 2 plus sign space I space Cu space space italic E degree subscript sel equals 2 comma 00 space V

Pasangan Al dan Ag

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree subscript sel end cell equals cell italic E degree subscript katode minus sign italic E degree subscript anode end cell row blank equals cell 0 comma 84 minus sign left parenthesis minus sign 1 comma 66 right parenthesis end cell row blank equals cell 2 comma 50 space V end cell end table

Al space I space Al to the power of 3 plus sign space parallel to space Ag to the power of plus sign space I space Ag space space italic E degree subscript sel equals 2 comma 50 space V

Pasangan Sn dan Zn

Zn space I space Zn to the power of 2 plus sign space parallel to space Sn to the power of 2 plus sign space I space Sn space space italic E degree subscript sel equals 0 comma 62 space V

Pasangan Sn dan Cu

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree subscript sel end cell equals cell italic E degree subscript katode minus sign italic E degree subscript anode end cell row blank equals cell 0 comma 34 minus sign left parenthesis minus sign 0 comma 14 right parenthesis end cell row blank equals cell 0 comma 48 space V end cell end table

Sn space I space Sn to the power of 2 plus sign space parallel to space Cu to the power of 2 plus sign space I space Cu space space italic E degree subscript sel equals 0 comma 48 space V

Pasangan Sn dan Ag

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree subscript sel end cell equals cell italic E degree subscript katode minus sign italic E degree subscript anode end cell row blank equals cell 0 comma 84 minus sign left parenthesis minus sign 0 comma 14 right parenthesis end cell row blank equals cell 0 comma 98 space V end cell end table

Sn space I space Sn to the power of 2 plus sign space parallel to space Ag to the power of plus sign space I space Ag space space italic E degree subscript sel equals 0 comma 98 space V

Pasangan Zn dan Cu

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree subscript sel end cell equals cell italic E degree subscript katode minus sign italic E degree subscript anode end cell row blank equals cell 0 comma 34 minus sign left parenthesis minus sign 0 comma 76 right parenthesis end cell row blank equals cell 1 comma 10 space V end cell end table

Zn space I space Zn to the power of 2 plus sign space parallel to space Cu to the power of 2 plus sign space I space Cu space space italic E degree subscript sel equals 1 comma 10 space V

Pasangan Zn dan Ag

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree subscript sel end cell equals cell italic E degree subscript katode minus sign italic E degree subscript anode end cell row blank equals cell 0 comma 84 minus sign left parenthesis minus sign 0 comma 76 right parenthesis end cell row blank equals cell 1 comma 60 space V end cell end table

Zn space I space Zn to the power of 2 plus sign space parallel to space Ag to the power of plus sign space I space Ag space space italic E degree subscript sel equals 1 comma 60 space V

Pasangan Cu dan Ag

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree subscript sel end cell equals cell italic E degree subscript katode minus sign italic E degree subscript anode end cell row blank equals cell 0 comma 84 minus sign 0 comma 34 end cell row blank equals cell 0 comma 50 space V end cell end table

Cu space I space Cu to the power of 2 plus sign space parallel to space Ag to the power of plus sign space I space Ag space space italic E degree subscript sel equals 0 comma 50 space V

Jadi, jawaban yang benar sesuai notasi sel diatas.

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