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Berdasarkan deret Volta, reaksi elektrokimia yang dapat berlangsung secara spontan adalah...

Berdasarkan deret Volta, reaksi elektrokimia yang dapat berlangsung secara spontan adalah...space

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

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

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

  4. 3 Mg to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 2 Al open parentheses italic s close parentheses yields 3 Mg open parentheses italic s close parentheses and 2 Al to the power of 3 plus sign left parenthesis italic a italic q right parenthesis

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

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S. Lubis

Master Teacher

Mahasiswa/Alumni Universitas Sumatera Utara

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah B.

jawaban yang tepat adalah B.

Pembahasan

Reaksi berlangsung secara spontan jika nilai potensial sel adalah positif. Pada sel volta, katode adalah tempat berlangsungnya reaksi reduksi, sedangkan anode adalah tempat berlangsungnya reaksi oksidasi. Berdasarkan data potensial reduksi sel, maka dapat diketahui: Mencari nilai potensial sel pada pilihan jawaban: A. B. C. D. E. Jadi, jawaban yang tepat adalah B.

Reaksi berlangsung secara spontan jika nilai potensial sel adalah positif. Pada sel volta, katode adalah tempat berlangsungnya reaksi reduksi, sedangkan anode adalah tempat berlangsungnya reaksi oksidasi. Berdasarkan data potensial reduksi sel, maka dapat diketahui:

Sn to the power of 2 plus end exponent left parenthesis a q right parenthesis plus 2 straight e to the power of minus rightwards arrow Sn left parenthesis s right parenthesis space space space space space straight E to the power of straight o equals negative 0 comma 14 space straight V Fe to the power of 2 plus end exponent left parenthesis a q right parenthesis plus 2 straight e to the power of minus rightwards arrow Fe left parenthesis s right parenthesis space space space space space straight E to the power of straight o equals negative 0 comma 41 space straight V Pb to the power of 2 plus end exponent left parenthesis a q right parenthesis plus 2 straight e to the power of minus rightwards arrow Pb left parenthesis s right parenthesis space space space space space straight E to the power of straight o equals negative 0 comma 13 space straight V Zn to the power of 2 plus end exponent left parenthesis a q right parenthesis plus 2 straight e to the power of minus rightwards arrow Zn left parenthesis s right parenthesis space space space space space straight E to the power of straight o equals negative 0 comma 76 space straight V Mg to the power of 2 plus end exponent left parenthesis a q right parenthesis plus 2 straight e to the power of minus rightwards arrow Mg left parenthesis s right parenthesis space space space space straight E to the power of straight o equals negative 2 comma 38 space straight V Al to the power of 3 plus end exponent left parenthesis a q right parenthesis plus 3 straight e to the power of minus rightwards arrow Al left parenthesis s right parenthesis space space space space space space space straight E to the power of straight o equals negative 1 comma 66 space straight V Ag to the power of plus left parenthesis a q right parenthesis plus 2 straight e to the power of minus rightwards arrow Ag left parenthesis s right parenthesis space space space space space space space straight E to the power of straight o equals negative 0 comma 80 space straight V


Mencari nilai potensial sel pada pilihan jawaban:

A. 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 negative sign 0 comma 41 minus sign left parenthesis minus sign 0 comma 14 right parenthesis space V end cell row blank equals cell negative sign 0 comma 27 space V end cell end table


B. 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 negative sign 0 comma 14 minus sign left parenthesis minus sign 0 comma 41 right parenthesis space V end cell row blank equals cell plus 0 comma 27 space V end cell end table


C. 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 negative sign 0 comma 76 minus sign left parenthesis minus sign 0 comma 13 right parenthesis space V end cell row blank equals cell negative sign 0 comma 63 space V end cell end table


D. 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 negative sign 2 comma 38 minus sign left parenthesis minus sign 1 comma 66 right parenthesis space V end cell row blank equals cell negative sign 0 comma 72 space V end cell end table


E. 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 negative sign 0 comma 80 minus sign left parenthesis minus sign 0 comma 13 right parenthesis space V end cell row blank equals cell negative sign 0 comma 67 space V end cell end table


Jadi, jawaban yang tepat adalah B.

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