Bằng phương pháp hóa học hãy nhận biết các hóa chất nào mất nhãn sau: KNO3, Ba(OH)2, HCl

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

the answer your looking for is c).