Iron metal reacts with hydrochloric acid to give H2 gas and Fe2+ ions.?

Question

Iron metal reacts with hydrochloric acid to give H2 gas and Fe2+ ions. If 5.8 g of iron is to be dissolved in 1.5 M HCl, what is the minimum volume of the acid solution required to react wtih all of the iron?

Answer 1

Atomic weights: Fe=56 Let the HCl solution be called S.

Fe + 2HCl ===> FeCl2 + H2

5.8gFe x 1molFe/56gFe x 2molHCl/1molFe x 1LS/1.5molHCl = 0.14L HCl solution.

Answer 2

volume = 1000 x moles / molarity

vol (cm3) = 1000 x (5.8/56) x (2/1.5)

There is a 1:2 ratio between Fe and HCl.