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B er d a s a r kan d a t a b er ik u t : F e 2 + + 2 e → F e , E 0 = − 0 , 44 V P b 2 + + 2 e → P b , E 0 = − 0 , 13 V Z n 2 + + 2 e → Z n , E 0 = − 0 , 76 V S n 2 + + 2 e → S n , E 0 = − 0 , 14 V R e ak s i y an g t i d ak d a p a t b er l an g s u n g s p o n tan a d a l ah ...

  1. Sn/Sn2+ // Pb2+ /Pb

  2. Zn/Zn2+ // Sn2+ /Sn

  3. Pb/Pb2+ // Zn2+ /Zn

  4. Fe/Fe2+ // Pb2+ / Pb

  5. Zn/Zn2+ // Fe2+ /Fe

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S. Utari

Master Teacher

Mahasiswa/Alumni Universitas Negeri Medan

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R e a k s i space y a n g space d a p a t space b e r l a n g s u n g space s p o n tan space a d a l a h space r e a k s i space y a n g space m e m i l i k i space n i l a i space E degree space p o s i t i f.  space R u m u s space E degree space a d a l a h space colon space  space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space E degree equals space E degree R e d u k s i minus E degree space o k s i d a s i space  P e r l u space d i k e t a h u i space b a h w a space E degree space R e d u k s i space greater than space E degree space O k s i d a s i. space  R e d u k s i space m e r u p a k a n space p e r i s t i w a space p e n u r u n a n space b i l a n g a n space o k s i d a s i space d a n space o k s i d a s i space m e r u p a k a n space p e r i s t i w a space k e n a i k a n space b i l a n g a n space o k s i d a s i. space  S e t e l a h space d i h i t u n g space s a t u space p e r space s a t u comma space m a k a space j a w a b a n space y a n g space t e p a t space a d a l a h space left parenthesis t i d a k space s p o n tan right parenthesis colon space  space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space P b divided by P b to the power of 2 plus end exponent space divided by divided by space Z n to the power of 2 plus end exponent space divided by Z n space  E degree equals space E degree R e d u k s i minus E degree space o k s i d a s i space  equals space E degree Z n minus E degree space P b space  equals space minus 0 comma 76 space V space – space left parenthesis negative 0 comma 13 space V right parenthesis space space  equals space minus space 0 comma 63 space V

 

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Dengan hanya melihat deret besarya E°tanpa menghitung perkirakan apakahtiap reaksi redoks berikut dapat berlangsung spontan. Jika reaksi berlangsung spontan sebagaimana yang tertulis, buatlah diagram ...

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