Question

What do you observed when hot concentrated caustic soda solution is added to zinc and aluminum?

Answer 1

a) Zinc react with hot conc. caustic soda or hot conc. sodium hydroxide to produce zincate sodium and hydrogen.

Zn+2NaOH→Na2ZnO2+H2

b) Aluminum react with sodium hydroxide to produce sodium aluminate, hydrogen and sodium oxide.
2Al + 6NaOH ----->2NaAlO2 + 3H2 + 2Na2O

Answer 2

Answer -
​


⛥ʜᴇʀᴇ ɪs ʏᴏᴜʀ ᴀɴsᴡᴇʀ ⚑➧➾
▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃ ☟


❖

i) Zinc react with hot conc. caustic soda or hot conc. sodium hydroxide to produce zincate sodium and hydrogen.

Zn+2NaOH→Na2ZnO2+H2

ii) Aluminum react with sodium hydroxide to produce sodium aluminate, hydrogen and sodium oxide.
2Al + 6NaOH ----->2NaAlO2 + 3H2 + 2Na2O