What type of reaction and predict the product of HBr + Fe?

Answer 1

Fe + HBr is a replacement reaction in which Fe replaces H because of it higher redox potential then H . I will chose that final product is salt FeBr2 . This is just guessing because Fe reacts with HCl forming FeCl2 which is another hallogene hydride.

Fe + 2HBr =FeBr2+H2

Fe2+ salts after longer exposure to air oxidize them selves to Fe3+ salts.

4FeBr2 + 3O2 = 2FeBr3 + 2Fe203 + Br2

or 4FeBr2 +2H20 + O2 =4FeBr2(OH)

Answer 2

You have an element reacting with a compound. This SCREAMS at you single replacement reaction.

So, you need to look at the lone element, Fe, which is a metal. That means it will replace the metal (positive) part in the compound. That means Iron will form a compound with the bromine and the hydrogen will be by itself.

However, there is a problem. Iron has two common oxidation states: 2+ and 3+. This means there are two possible compounds it can make with bromine: Iron(II)bromide (FeBr2) or Iron(III)bromide (FeBr3). It was not mentioned which oxidation state iron is taking, so I would include both.

So, the products I would say come from this reaction are: FeBr2, FeBr3 and H2