Dancing greenish blue flames || Aluminum react with copper chloride and HCl ||

Chemathon -2019
Chemistry Department
Adamas University
Explanation :-
• Here two redox reaction is going on .
1. Aluminium reacts with HCl and produce aluminium chloride and hidrogen gas.
The source of the flame is hydrogen gas
2Al +6HCl → 2 AlCl3 + 3H2
2. Aluminium further reacts with Copper chloride to produce Aluminium chloride & Copper
During this reduction process the excited electrons convert the flame colour to greenish blue.
2Al + 3CuCl2 → 2AlCl3 + 3Cu