

Aplikasi Sel Voltya Dalam Kehidupan
Presentation
•
Chemistry
•
12th Grade
•
Hard
Ncy Maulany
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5 Slides • 0 Questions
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by Ncy Maulany
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Ingat Yach.....
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Setelah kegiatan pembelajaran 2 ini Anda diharapkan dapat:
Memahami sel volta dalam kehidupan sehari hari
Mengajukan rancangan sel volta menggunakan bahan di sekitar
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. Baterai kering (sel Leclanche) Sel baterai merupakan pengembangan dari sel Leclanche (1839-1882), dengan desain awal yang tetap dipertahankan, yakni sel kering mangan. Sel kering mangan terdiri dari 3 komponen utama yaitu bungkus dalam zink (Zn) sebagai elektroda negatif (anoda), batang karbon (C) sebagai elektroda positif (katoda) dan pasta MnO2 dan NH4Cl yang berperan sebagai elektrolit.
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Pada sel kering, reaksi oksidasi terjadi pada logam seng dan reaksi reduksi terjadi pada karbon yang inert. Elektrolitnya adalah pasta MnO2, ZnCl2, NHCl dan karbon hitam. Reaksi:
Anoda Zn(s) Zn2+(aq) + 2e
Katoda 2MnO2(s) + 2NH4+(aq) + 2e- Mn2O3(s) + 2NH3(aq) + H2O(l)
by Ncy Maulany
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