ICSE Class 10 Answered
What is action of Sodium Hydroxide Test with Zinc and Aluminium (Action of alkalis on metals)?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
Zinc reacts with hot and conc. sodium hydroxide to form sodium zincate with the liberation of hydrogen.
Zn + 2NaOH → Na2ZnO2 + H2
Sodium zincate
Aluminium reacts only with boiling and dilute sodium hydroxide to form sodium meta aluminate.
2 Al + 2NaOH + 2H2O → 2NaAlO2 + 3H2
Sodium meta aluminate
Answered by | 04 Jun, 2014, 03:23: PM
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