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Question

Explain and give reasons why aluminium vessels should not be cleaned with powders containing alkalis.


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Solution

  • Aluminium vessels should not be cleaned with powders containing alkalis because it results in the formation of aluminates and liberates hydrogen gas.
  • Reaction of aluminium with alkali:

2Al(s)+2NaOH(aq)+2H2O(l)2NaAlO2(aq)+3H2(g)sodiumsodiummetahydroxidealuminate


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