Question

The process by which hydrogen is prepared by the reaction of silicon, iron alloy and NaOH is

Answer 1

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Your solution is here.

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The process by which hydrogen is prepared by the reaction of Silicon , iron alloy & NaOH is called Ferrosilicon method. 

⇔In this process →

Sodium hydroxide React with Ferrosilicon & Water, It produces Sodium silicate and further in contact with water, ferrosilicon slowly produce Hydrogen .

⇔Reaction/ Description of the Ferrosilicon Process →

2NaOH + Si + H₂O --------→ Na₂SiO₃ + 2H₂  →→  (i)

this equation represent the reaction taking place at the beginning 

further.

Na₂SiO₃ + H₂O  ---------→ 2NaOH +SiO₂.xH₂O →→(ii)

By Combining these two reaction (i) & (ii) , Finally we have

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Si + xH₂O ---------→ SiO₂xH₂O + 2H₂

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This process produce Hydrogen very rapidly that's why they do not give Off hydrogen until mixed. 

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Hope it Helps.

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