Question

Al2O3(s) + 2NaOH(aq) + 3H2O(l)2Na[Al(OH)4](aq) + (X)(g)Al2O3.xH2O(S) +2NaHCO3(aq)Al2O3(s) + xH2O(g) ‘X’ and ‘Y’ in the above reaction respectively are

A) COB) CO2C) 1400 KD) 1470 K 

The correct answer is​

Answer 1

Answer:

This is the correct answer

If aluminum is coated with a passive layer (AlO3) and it reacts with NaOH solution the oxide layer is dissolved, but what is the reaction and what happens to aluminum superficie? Oxide layer remains or any aluminum hydrate is formed. I need to prepare the surface for zincating process.

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