Oxidation of Iron
Fe oxided O reduced
2Feº + ³/2 O2 -> Fe2O3
Feº -> Fe³+ + 3eˉ
2Oº + 4eˉ -> 2O²ˉ
Stage 1. Chemical Reactions in life and the Environment
Matter undergoes physical and chemical changes through chemical reactions formed by products and reactants represented in chemical equations. They classify in mass exchange and energy exchange. Mass exchange centrates in neutralization, single displacement, double displacement, decomposition, synthesis, and combustion. energy exhange only takes part on exothermic and endothermic changes.
Obtaining of Cement
The calcium silicate is hydrated and transformed
in other oxide and a base + water.
This face is known as hydration (2C3S + 6H = C3S2H3 + 3CH, 2C2S + 4H = C3S2H3 + CH).
2Ca2 Si O4 (s)+ H2O (l)
---> Ca3 Si2 O7•3H2O(s)+ Ca(OH)2 (s)
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