How many grams of 10% hydrogen chloride solution is required for the reaction with 14 grams of iron.

The equation for the reaction of iron with hydrochloric acid:

Fe + 2HCl = FeCl2 + H2

The amount of iron substance:

v (Fe) = m (Fe) / M (Fe) = 14/56 = 0.25 (mol).

According to the reaction equation, 1 mol of Fe reacts with 2 mol of HCl, therefore:

v (HCl) = v (Fe) * 2 = 0.25 * 2 = 0.5 (mol).

Thus, the mass of hydrogen chloride required to prepare the solution is:

m (HCl) = v (HCl) * M (HCl) = 0.5 * 36.5 = 18.25 (g)

and the mass of the hydrochloric acid solution:

mr.-ra (HCl) = m (HCl) * 100 / w (HCl) = 18.25 * 100/10 = 182.5 (g).

Answer: 182.5 g.