1. Chemical reduction of zinc oxides in the presence of reduced carbon 2. Formation of anorthite during mineral carbonation 3. Precipitation of calcite during mineral carbonation
Formal Charges
Formal charges have an important role in organic chemistry since this concept helps us to know whether an atom in a molecule is neutral/bears a positive or negative charge. Even if some molecules are neutral, the atoms within that molecule need not be neutral atoms.
Polarity Of Water
In simple chemical terms, polarity refers to the separation of charges in a chemical species leading into formation of two polar ends which are positively charged end and negatively charged end. Polarity in any molecule occurs due to the differences in the electronegativities of the bonded atoms. Water, as we all know has two hydrogen atoms bonded to an oxygen atom. As oxygen is more electronegative than hydrogen thus, there exists polarity in the bonds which is why water is known as a polar solvent.
Valence Bond Theory Vbt
Valence bond theory (VBT) in simple terms explains how individual atomic orbitals with an unpaired electron each, come close to each other and overlap to form a molecular orbital giving a covalent bond. It gives a quantum mechanical approach to the formation of covalent bonds with the help of wavefunctions using attractive and repulsive energies when two atoms are brought from infinity to their internuclear distance.
![Chemical reduction of zinc oxides
1.
in the presence of reduced carbon
2. Formation of anorthite
during mineral carbonation
3. Precipitation of
calcite during mineral carbonation
Caco3 + 2H* = Ca2*+
H20 + CO2
13
4. Oxidation of zinc sulfides under
reduced conditions
3Fe* + 3H,0 = 3Fe
5. Chemical oxidation of iron di-
sulfides under oxidizing conditions
(OH)3
+ 3H*
6.
Chemical oxidation of pyrite by
2Cus+ 4H*+ O2 (g) =
2Cu2* +25 + 2H,0
oxygen under reducing conditions
7.
Acid rain formation
FeS, (s) + 7/2 0, + H2O
= Fe2" + 25042 + 2H*
8.
Dissolution of copper sulfides
under alkaline conditions
CaAl,Si,Og + CO2 + H20
9.
Alkaline dissolution of calcite
= CacO3 + AlzSizO5
(OH)4
10. Precipitation of ferric hydroxides
Zno (s) + C (s) = Zn (s) +
CO
11. Partial weathering of mica
and silica under acidic conditions
12. Precipitation of ferrous hydroxides
co, (e) + H20 (I) =
H,CO, (aq)
13. Formation of calcite under acidic
conditions
H,CO, (aq) = H+ (aq) +
HCO, (aq)
14. Chemical reduction of zinc oxides
in the presence of oxidized carbon
compounds
15. The leaching of cupper under
acidic conditions
16. Dissolution of Calcite under acidic
conditions.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4a1928e1-5345-4b4b-a613-69e846b8b375%2F1e5fc71d-3ec5-4da5-887d-2b7de150699d%2Fud1m2w_processed.png&w=3840&q=75)
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