Untuk dapat menyetarakan reaksi : 4Fe+O2 → 2Fe2O3 maka koefisien yang tepat untuk gas oksigen adalah…….

untuk dapat menyetarakan reaksi :
4Fe+O2 → 2Fe2O3
maka koefisien yang tepat untuk gas oksigen adalah…….

Jawaban: Koefisien untuk gas oksigen adalah 3.

Persamaan reaksi menggambarkan zat-zat kimia yang terlibat sebelum dan sesudah reaksi kimia, baik secara kualitatif maupun kuantitatif. Langkah-langkah menyetarakan reaksi adalah:
1. Tuliskan rumus kimia dari reaktan dan produk reaksi.
4Fe + O₂ → 2Fe₂O₃
2. Berikan koefisien sementara untuk zat yang belum diketahui koefisiennya dengan huruf a, b, c, dan seterusnya.
4Fe + aO₂ → 2Fe₂O₃
3. Setarakan atom-atom. Jika terdapat ion poliatom yang sama di ruas kiri dan kanan, setarakan sebagai ion poliatom bukan sebagai atom.
Jumlah atom O ruas kiri = Jumlah atom O ruas kanan
2a = 2 × 3
2a = 6
a = 3
Persamaan reaksi setaranya adalah 4Fe + 3O₂ → 2Fe₂O₃.

Jadi, koefisien untuk gas oksigen adalah 3.

Baca Juga :  Complete the sentences with a form of the verb in parentheses. Three hundred and fifty years ago, people (1. make) /made/ their own clothes. They (2. have, not) _____ machines for making clothes. There (3. be, not) _____ any clothing factories. People (4. tear) _____ homemade clothes that were sewn by hand. Today, very few people (5. make) _____ their own clothes. Clothing (6. come) _____ ready-made from factories. People (7. buy) _____ almost all their clothes from stores. The modern clothing industry (8. be) _____ international. As a result, people from different countries often (9. wear) _____ similar clothes. For example, people in many different countries throughout the world (10. wear) _____ jeans and t-shirts. However, some regional differences in clothing still (11. exist) _____ for instance, people of the Arabian deserts (12. wear) _____ loose, flowing lobes to protect themselves from the heat of the sun. In parts of Northern Europe, fur hats (13. be) _____ common in the winter. In the future, there (14. be, probably) _____ fewer and fewer differences in clothing. People throughout the world (15. wear) _____ clothes from the same factories. (16. We all, dress) _____ in the future? TV shows and movies about the future often (17. show) _____ everybody in a uniform of some kind. What (18. you, think) _____? Number 12