Question

Iron (s) + oxygen (g)?Iron (III) oxide (s)

We know that the concentration of oxygen decreases throughout the experiment. Why can we say that the concentration of iron remains constant throughout this experiment?

Answer 1

Answer) of decreases. Fecs) + 02(g) → Fe2O3 (5) Now, concentration of O2 is given by Pressure as it is a gasseous species, now with the de chease of number of moles of Oz - , Pressure Pressure of Oz deeneases and thus concentration or decreases . concentration of fe is given by activity as it is a pure species. Now, u a number of moles of remains the Fe, , same ie activity the 1. so, concentration of fe remains Conc of number of came i.e. the decrease o pemains same throughout.