Write the balanced chemical equations for the following reactions:
1) Thermit reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.
2) Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride.
3) Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.
4) Ethanol is burnt in air to form carbon dioxide, water and releases heat.
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Answer:
1) Thermit reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.
Answer: Fe2O3 + 2Al ⇨ 2Fe + Al2O3 + Heat + Light
2) Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride.
Answer: 3MgS + N2 ⇨ 2Mg3N2
3) Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.
Answer: 2KI + Cl2 ⇨ 2KCl + I2
4) Ethanol is burnt in air to form carbon dioxide, water and releases heat.
Answer: C2H5OH + 3O2 ⇨ 2CO2 + 3H2O + Heat
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Fe3O2 + 2Al - 3Fe + 2AlO
Mg + N2 (in presence of O) - Mg No2
Cl + KI - KCl + I(solid)
[ Finkel Stein reaction ]
2C2H5OH + 3O2 - 4Co2 + 5H2O + Δ
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