Oxides 6. What is the oxidation state (i.e., charge) of iron in Hematite Fe203?
ID: 112917 • Letter: O
Question
Oxides 6. What is the oxidation state (i.e., charge) of iron in Hematite Fe203? Calculations> Oxidation State: 7. What common element could replace Iron in Hematite's structure and what mineral is formed? Element: Mineral: Formula: What is the oxidation state (i.e., charge) of iron in Magnetite? (hint: could be more than one) Calculations 8. Oxidation State(s): Carbonates 9. What is the net charge of the anionic carbonate complex (CO3)? Calculations: Charge 10. What three common elements would satisfy this charge and what are the minerals formed? Element 1: Element 2: Element 3: Mineral 1: Mineral 2 Mineral 3 Formula 1: Formula 2: Formula3 Silicates 11. What is the formula and charge of a silica tetrahedron? (1 Si surrounded by 4 Os) (formula)charge (formula)charge. (formula)charje Calculations: 12. If Aluminum substitutes for silicon in the tetrahedron, what is the formula and charge of the tetrahedron? (1 Al surrounded by 4 Os) Calculations: 13. What is the formula and charge of a pair of silica tetrahedra? (these are sorosilicates) Calculations:Explanation / Answer
6)Fe2O3 let oxidation charge of iron is x'.
Hence the net charge is zero
Hence 2(x) + 3(-2)=0
2x-6=0
2x=6
X=3
Hence oxidation charge of Fe is +3.
7) "Al" replace Fe and forms as Al2O3.mineral is corundum
8) Magnetite formula is Fe3O4
Fe be 'x'
3x+4(-2)=0
3x-8=0
3x=8
x=8/3
This a fermentation state where the ions can be replaced.
9) the net charge or anionic in carbonate CO3 compound is "-2".
The no. Of electrons will be two more electrons (32) than the protons (30). It is a poliatomic ion with 1 carbon atom and 3 oxygen atoms.
11) SiO4 with charge -4.
The four oxygen atoms combine with the single electron of a silicon atom in a covalent bond leaving one electron.Hence there will be 4 anions.So 4 negative charged ions remains leaving SiO4 with -4.
13) Si2O7 is the formula with -6 charge.One of the corner oxygen shares with the tetrahedron.
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