Question

Why should hood fans be on when you’re dissolving the aluminum?

Answer 1

The Balanced chemical reaction equation is

2Al (s) + 6HCl --> 2AlCl₃ + 3H₂ (g)        -----------> This is an exothermic reaction

The reaction of HCl and Aluminum is a single replacement reaction, wherein aluminum "replaces" the hydrogen in the hydrogen chloride and forms aluminum chloride and due to massive amount of hydrogen being produced. This reaction is normally very exothermic, but varies due to the concentrations of HCl. Highly flammable hydrogen makes even explosive environment.

Hence we should swith-on hood fans when we're dissolving the aluminum.

Thank You So Much! Please Rate this answer as you wish.