RoboguruRoboguru
SD

Hitunglah potensial sel () tiap reaksi berikut. Tentukan apakah pembentukan produk dapat terjadi atau tidak. Gunakan Tabel 2.1 untuk mengetahui potensial reduksi standar masing-masing setengah sel. A. I2​(s)+Mg(s)→Mg2+(aq)+2I−(aq) B. Ag(s)+Fe3+(aq)→Ag+(aq)+Fe2+(aq) C. Sn2+(s)+2Ag+(aq)→Sn4+(aq)+2Ag(s) D. 2Zn(s)+O2​(g)+2H2​O(l)→2Zn2+(aq)+4OH−(aq)

Pertanyaan

Hitunglah potensial sel (italic E italic degree subscript sel) tiap reaksi berikut. Tentukan apakah pembentukan produk dapat terjadi atau tidak. Gunakan Tabel 2.1 untuk mengetahui potensial reduksi standar masing-masing setengah sel.

A. I subscript 2 open parentheses italic s close parentheses and Mg open parentheses italic s close parentheses yields Mg to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 2 I to the power of minus sign left parenthesis italic a italic q right parenthesis

B. Ag open parentheses italic s close parentheses and Fe to the power of 3 plus sign left parenthesis italic a italic q right parenthesis yields Ag to the power of plus sign left parenthesis italic a italic q right parenthesis plus Fe to the power of 2 plus sign left parenthesis italic a italic q right parenthesis

C. Sn to the power of 2 plus sign open parentheses italic s close parentheses and 2 Ag to the power of plus sign left parenthesis italic a italic q right parenthesis yields Sn to the power of 4 plus sign left parenthesis italic a italic q right parenthesis plus 2 Ag open parentheses italic s close parentheses

D. 2 Zn open parentheses italic s close parentheses and O subscript 2 open parentheses italic g close parentheses and 2 H subscript 2 O open parentheses italic l close parentheses yields 2 Zn to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 4 O H to the power of minus sign left parenthesis italic a italic q right parenthesis

I. Yassa

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

Jawaban terverifikasi

Pembahasan

italic E italic degree subscript sel dapat dihitung berdasarkan selisih potensial reduksi zat yang tereduksi dengan potensial reduksi zat teroksidasi. Hasil italic E italic degree subscript sel dapat digunakan untuk menentukan apakah reaksi dapat terjadi secara spontan atau tidak. Berdasarkan data italic E italic degree subscript sel, maka potensial reduksi dari:


I subscript 2 open parentheses italic s close parentheses and 2 e to the power of minus sign yields 2 I to the power of minus sign left parenthesis italic a italic q right parenthesis space space space italic E italic degree equals plus 0 comma 54 space V Mg to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 2 e to the power of minus sign yields Mg open parentheses italic s close parentheses space space space italic E italic degree equals minus sign 2 comma 36 space V Ag to the power of plus sign left parenthesis italic a italic q right parenthesis plus e to the power of minus sign yields Ag open parentheses italic s close parentheses space space space italic E italic degree equals plus 0 comma 80 space V Fe to the power of 3 plus sign left parenthesis italic a italic q right parenthesis plus e to the power of minus sign yields Fe to the power of 2 plus sign left parenthesis italic a italic q right parenthesis space space space italic E italic degree equals plus 0 comma 77 space V Sn to the power of 4 plus sign left parenthesis italic a italic q right parenthesis plus 2 e to the power of minus sign yields Sn to the power of 2 plus sign left parenthesis italic a italic q right parenthesis space space space italic E italic degree equals plus 0 comma 25 space V Zn to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 2 e to the power of minus sign yields Fe open parentheses italic s close parentheses space space space italic E italic degree equals minus sign 0 comma 76 space V O subscript 2 open parentheses italic g close parentheses and 4 H subscript 2 O open parentheses italic l close parentheses and 4 e to the power of minus sign yields 4 O H to the power of minus sign left parenthesis italic a italic q right parenthesis space space space italic E italic degree equals plus 0 comma 40 space V


Maka italic E italic degree subscript sel reaksi dari:


A. I subscript 2 open parentheses italic s close parentheses and Mg open parentheses italic s close parentheses yields Mg to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 2 I to the power of minus sign left parenthesis italic a italic q right parenthesis


table attributes columnalign right center left columnspacing 0px end attributes row cell italic E italic degree sel end cell equals cell italic E italic degree subscript I subscript 2 forward slash I to the power of minus sign end subscript italic minus sign italic E italic degree subscript Mg to the power of 2 plus sign forward slash Mg end subscript end cell row blank equals cell 0 comma 54 minus sign left parenthesis minus sign 2 comma 36 right parenthesis space V end cell row blank equals cell plus 2 comma 90 space V end cell end table


Karena italic E italic degree subscript sel bernilai positif maka reaksi berlangsung spontan.


B. Ag open parentheses italic s close parentheses and Fe to the power of 3 plus sign left parenthesis italic a italic q right parenthesis yields Ag to the power of plus sign left parenthesis italic a italic q right parenthesis plus Fe to the power of 2 plus sign left parenthesis italic a italic q right parenthesis


table attributes columnalign right center left columnspacing 0px end attributes row cell italic E italic degree sel end cell equals cell italic E italic degree subscript Fe to the power of 3 plus sign forward slash Fe to the power of 2 plus sign end subscript italic minus sign italic E italic degree subscript Ag to the power of plus sign forward slash Ag end subscript end cell row blank equals cell 0 comma 77 minus sign left parenthesis plus 0 comma 88 right parenthesis space V end cell row blank equals cell negative sign 0 comma 18 space V end cell end table


Karena italic E italic degree subscript sel bernilai negatif maka reaksi berlangsung tidak spontan.


C. Sn to the power of 2 plus sign open parentheses italic s close parentheses and 2 Ag to the power of plus sign left parenthesis italic a italic q right parenthesis yields Sn to the power of 4 plus sign left parenthesis italic a italic q right parenthesis plus 2 Ag open parentheses italic s close parentheses


table attributes columnalign right center left columnspacing 0px end attributes row cell italic E italic degree sel end cell equals cell italic E italic degree subscript Ag to the power of plus sign forward slash Ag end subscript italic minus sign italic E italic degree subscript Sn to the power of 4 plus sign forward slash Sn to the power of 2 plus sign end subscript end cell row blank equals cell 0 comma 80 minus sign left parenthesis plus 0 comma 25 right parenthesis space V end cell row blank equals cell plus 0 comma 55 space V end cell end table


Karena italic E italic degree subscript sel bernilai positif maka reaksi berlangsung spontan.

D. 2 Zn open parentheses italic s close parentheses and O subscript 2 open parentheses italic g close parentheses and 2 H subscript 2 O open parentheses italic l close parentheses yields 2 Zn to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 4 O H to the power of minus sign left parenthesis italic a italic q right parenthesis


table attributes columnalign right center left columnspacing 0px end attributes row cell italic E italic degree sel end cell equals cell italic E italic degree subscript O subscript 2 forward slash O H to the power of minus sign end subscript italic minus sign italic E italic degree subscript Zn to the power of 2 plus sign forward slash Zn end subscript end cell row blank equals cell 0 comma 40 minus sign left parenthesis minus sign 0 comma 76 right parenthesis space V end cell row blank equals cell plus 1 comma 16 space V end cell end table


Karena italic E italic degree subscript sel bernilai positif maka reaksi berlangsung spontan.


Jadi, reaksi yang memiliki italic E italic degree subscript sel positif adalah reaksi:


I subscript 2 open parentheses italic s close parentheses and Mg open parentheses italic s close parentheses yields Mg to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 2 I to the power of minus sign left parenthesis italic a italic q right parenthesis,

Sn to the power of 2 plus sign open parentheses italic s close parentheses and 2 Ag to the power of plus sign left parenthesis italic a italic q right parenthesis yields Sn to the power of 4 plus sign left parenthesis italic a italic q right parenthesis plus 2 Ag open parentheses italic s close parentheses, dan

2 Zn open parentheses italic s close parentheses and O subscript 2 open parentheses italic g close parentheses and 2 H subscript 2 O open parentheses italic l close parentheses yields 2 Zn to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 4 O H to the power of minus sign left parenthesis italic a italic q right parenthesis.


Dengan italic E italic degree subscript sel secara berturut-turut adalah +2,90 V, +0,55 V, dan 1,16 V. Sedangkan pada reaksi Ag open parentheses italic s close parentheses and Fe to the power of 3 plus sign left parenthesis italic a italic q right parenthesis yields Ag to the power of plus sign left parenthesis italic a italic q right parenthesis plus Fe to the power of 2 plus sign left parenthesis italic a italic q right parenthesis  italic E italic degree subscript sel bernilai negatif, yaitu -0,18 V (reaksi tidak berlangsung spontan).

444

5.0 (1 rating)

Pertanyaan serupa

Beberapa data harga potensial reduksi standar (Eo) berikut : Ag+ (aq) + e→ Ag (s)                  E∘= + 0,8 VPb2+ (aq) + 2e →Pb (s)               E∘= −0,14 VNi2+ (aq) + 2e → Ni (s)                E∘...

108

0.0

Jawaban terverifikasi

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Roboguru

Coba GRATIS Aplikasi Ruangguru

Download di Google PlayDownload di AppstoreDownload di App Gallery

Produk Ruangguru

Produk Lainnya

Hubungi Kami

Ruangguru WhatsApp

081578200000

Email info@ruangguru.com

info@ruangguru.com

Contact 02140008000

02140008000

Ikuti Kami

©2022 Ruangguru. All Rights Reserved PT. Ruang Raya Indonesia