Write the balanced equations for the following reactions. Corrosion of iron. Fe

Question

Write the balanced equations for the following reactions. Corrosion of iron. Fe + H_2O doubleheadarrow Fe_2O_3 + H_2 Combustion of ethane C_2H_6 + O_2 doubleheadarrow CO_2 + H_2O The most widely used coagulants for water and wastewater treatment are aluminum and iron salts. Aluminum sulfate reacts with natural alkalinity In water to form aluminum hydroxide floe. Al_2 (SO_4)_3 14.3 H_2O + Ca (HCO_3)_2 doubleheadarrow Al(OH)_3 + CaSO_4 + CO_2 + H_2O Aluminum sulfate reacts with soda ash In water to form aluminum hydroxide floe. Al_2 (SO_4)_3 14.3 H_2O + Na_2CO_3 + H_2O Al(OH)_3 + Na_2SO_4 + CO_2 + H_2O Ferrous sulfate (copperas) reacts with calcium carbonate (natural alkalinity) and oxygen to give ferric hydroxide, calcium sulfate, carbon dioxide, and water. FeSO_4 7H_2O + Ca (HCO_3)_2 + O_2 doubleheadarrow Fe (OH)_3 + CaSO_4 + CO_2 + H_2O

Explanation / Answer

Answer :

1) Corrosion of Iron. A balanced reaction is,

2 Fe + 3 H2O --------------> Fe2O3 + 3 H2.

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2) Complete combustion of Ethane.

C2H6 + 7/2 O2 -----------> 2 CO2 + 3 H2O.

or

2 C2H6 + 7 O2  -----------> 4 CO2  + 6 H2O.

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3) Al2(SO4)3 14.3 H2O + 3 Ca(HCO3)2 ----------------> 2 Al (OH)3 + 3 CaSO4 + 6 CO2 + 14.3 H2O

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4) Al2(SO4)3 14.3 H2O + 3 Na2CO3 + 3 H2O ----------------> 2 Al (OH)3   + 3 Na2SO4  + 6 CO2  + 14.3 H2O

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5) FeSO4 7H2O + Ca(HCO3)2  + O2 --------------> Fe(OH)2 + CaSO4 + 2 CO2 + 8 H2O.

Something wrong with reaction, Is it a REDOX reaction. Because rest above were not.

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