Question

why naO4 solution cannot be kept in al container write equation for the reaction ​

Answer 1

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Aluminum is more reactive than Sodium, so displacement reaction will occur and aluminum will displace sodium from sodium hydroxide and small pores are formed on container

2 Al + 2 NaOH + 6 H2O → 2 Na+ + 2[Al(OH)4]- + 3 H2 (gas)

hence sodium hydroxide solution cannot be kept in aluminum containers.