Download - Kobalt
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KEBERADAAN
SIFAT FISIKA
SIFAT KIMIA
KEGUNAAN
Clarissa Welny Saleh
Siti AisyahWike Zahra MustafawiSenyawa
SEJARAH
ANALISIS
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SEJARAH
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Kerajinan
Masyarakat Mesir
SEJARAH
Kobalt berasal dari kata Kobald yang
berarti Goblin atau Jiwa Setan
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KEBERADAAN
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Sifat fisika
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Sifat Fisika
- Keras
- Berkilauan ,
- Ferromagnetik,
menyerupai penampakan besi dan nikel
- Titik Lebur : 14900 C
- Titik Leleh : 35200 C
- tingkat oksidasi :1, 0, +1,
+2,
- +3, +4, +5
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Sifat KIMIA
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Sifat KIMIA
Reaksi kobalt dengan Air 2Co(s) + O2(g) → 2CoO(s)Reaksi Kobalt dengan Halogen
Co(s) + Br2(l) → CoBr2(s)Co(s) + Cl2(g) → CoCl2(s)Co(s) + I2(s) → CoI2(s)
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SOURCEhttp://www.youtube.com/watch?v=GS9kIj9nBU&feature=results_main&playnext=1&list=PL9CA02C53CE7B00FE
Kobalt Facts!
Garam Co (II) lebih stabil daripada
garam Co (III), sedangkan logam
Co (III) lebih stabil dalam bentuk
kompleksnya dibandingkan
garamnya.
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KEGUNAAN
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SENYAWA KOBALT
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Analisis
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1. Konvensional
Gravimetri menggunakan 1-Nitroso-2-naftol
menghasilkan endapan merah Co(C10H6O2N)3
Gravimetri menggunakan HgCl2 dan NH4SCN
membentuk endapan biru Co[Hg(SCN)4]
Analisis Kuantitatif
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Analisis Kuantitatif
2. Instrumentasi