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500 mL larutan AgNO 3 dielektrolisis dengan elektrode Pt selama 1 jam dengan arus 2 ampere sehingga logam Ag akan terendapkan. Hitunglah pH larutan yang terjadi setelah elektrolisis selesai dilakukan! (Ar Ag = 108)

500 mL larutan AgNO3 dielektrolisis dengan elektrode Pt selama 1 jam dengan arus 2 ampere sehingga logam Ag akan terendapkan. Hitunglah pH larutan yang terjadi setelah elektrolisis selesai dilakukan! (Ar Ag = 108)

  1. 13 + log 1,5

  2. 13 – log 1,5

  3. 2

  4. 1 – log 1,5

  5. 1 + log 1,5

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M. Juliana

Master Teacher

Mahasiswa/Alumni Universitas Negeri Medan

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Pembahasan

Reaksi di katoda : Ag + + e Ag

Reaksi di katoda : Ag+ + e rightwards arrowAg

begin mathsize 12px style straight W subscript ag space equals fraction numerator Ar straight space straight x straight space straight t straight space straight x straight space straight I over denominator 96500 straight space straight x straight space straight n end fraction space space space space space space space space equals fraction numerator 108 straight space straight x straight space 3600 det straight space straight x straight space 2 straight A over denominator 96500 straight space straight x straight space 1 end fraction space space space space space space space space equals 8 comma 06 space gram Mol space Ag space equals space straight g divided by Ar space equals space 8 comma 06 divided by 108 space equals space 0 comma 075 space mol space Mol space straight e space equals space mol space Ag space equals space 0 comma 075 space mol  Reaksi space di space anoda space colon space straight H subscript 2 straight O space rightwards arrow space 4 straight H to the power of plus space plus space 4 straight e space plus space straight O subscript 2 space Mol space straight e space equals space mol space straight H plus space equals space 0 comma 075 space mol left square bracket straight H plus right square bracket space equals space mol divided by straight V space equals space 0 comma 075 space mol divided by 0 comma 5 straight L equals space 0 comma 15 space straight M space equals space 1 comma 5 space straight x space 10 to the power of negative 1 end exponent space straight M pH space equals space minus space log space left square bracket straight H to the power of plus right square bracket space equals space minus space log space 1 comma 5 space straight x space 10 to the power of negative 1 end exponent space equals space bold 1 bold space bold – bold space bold log bold space bold 1 bold comma bold 5 end style

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