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:
$2 Al (s) + 2 NaOH (aq) + 2 H_{2} O (l) \to 2 {NaAlO}_{2} (aq) + 3 H_{2} (g) ↑ sodium sodium meta hydroxide aluminate$

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

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