How many moles of iron are needed to produce 30.2 L of hydrogen gas according to the following reaction at 0 °C and 1 atm?

Question

iron (s) + hydrochloric acid(aq)iron(II) chloride (aq) + hydrogen(g)

Answer 1

Hi Julissa A.,

Same technique as your previous question! Convert the H2, in this case, to moles using the Universal Gas Law; write the balanced equation; crank through the moles. Interestingly, with dilute acid in the absence of oxygen iron produces Fe(2+). This could make an interesting lab, using spectra for Fe ions to differentiate levels of Fe(3+) (yellow/green) and Fe(2+) (orange/red) produced under actual lab conditions.

--Cheers, --Mr. d.