As described in Section 14.1, jailed spies on the big screen have been known to use acid stored in a pen to dissolve jail bars and escape. What minimum volume of 12.0 M hydrochloric acid would be required to completely dissolve a 500.0-g iron bar? Would this amount of acid fit into a pen?
Volume of HCl =12.0 M
Weight of iron bar =500 g
2Fe(s) + 6HCl(aq) 2FeCl3(aq) + 3H2(g) .
500.0 g Fe / 55.85 g/mol = 8.95 mol Fe X (6 mol HCl / 2 mol Fe) = 26.9 mol HCl .