Question

What type of reaction is `FeS + HCl -> FeCl_2 + H_2S`?

Answer 1

Double displacement.

Explanation:

It's a double displacement reaction.

These commonly occur when the reactant species are both binary compounds. You might want to balance it though if you have to do any further calculations.

`FeS(s) + 2HCl(aq) -> FeCl_2(aq) + H_2S(g)`