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KIM – 3.5/4.5/5/1.1
11. Pada gelas nomor 9, masukkan paku kedalam gelas kimia kemudian ke
dalam gelas kimia masukkan minyak tanah sampai semua paku
terendam. kemudian gelas ditutup dengan menggunakan plastik kresek
yang diikat karet
12. Pada gelas nomor 10, masukkan paku kedalam gelas kimia kemudian ke
dalam gelas kimia masukkan asam cuka sampai semua paku terendam.
kemudian gelas ditutup dengan menggunakan plastik kresek yang diikat
karet
13. Diamkan semua gelas kurang lebih 2 hari
14. Amati apa yang terjadi
15. Bandingkan gelas yang paling cepat mengalami korosi dan yang paling
lambat mengalami korosi
Berdasarkan praktikum yang kalian lakukan, jawablah pertanyaan berikut:
1. Manakah dari kesepuluh gelas yang berisi paku yang mengalami karat paling cepat?
Kemukakan jawabanmu!
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2. Manakah dari kesepuluh gelas yang berisi paku yang mengalami karat paling
lambat? Kemukakan jawabanmu!
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3. Kemukakan jawabanmu, apa fungsi silika gel pada gelas 5?
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4. Berdasarkan percobaan yang kalian lakukan. Apa yang dapat kalian simpulkan?
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