Question

The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is _____.

Answer 1

Metal which produces hydrogen gas:

Aluminum metal produces hydrogen gas with dilute hydrochloric acid as well as sodium hydroxide.

What are amphoteric oxides?

Amphoteric oxides are the metal oxides which reacts with both acids and bases.

Some metals are also amphoteric, ie. on reaction with acid or base, the product will be salt and Hydrogen gas.

Amphoteric metal + acid/base →  salt + hydrogen gas

Few metals of the periodic table are amphoteric in nature. Like Aluminum, Zinc etc.

Reactions:

Reaction with dilute NaOH:

2Al + 2NaOH + 2$H_{2}$O → 2NaAl$O_{2}$ + $H_{2}$

Reaction with dilute HCl:

2Al + 6HCl(aq) → 2Al$Cl_{3}$ + 3$H_{2}$

Dilute and Aqueous (aq) means mixed with water ($H_2O$)

These reaction are balanced in order to follow the Law of conservation of mass.

Learn more about balanced reactions here,

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