Fe(ii) can be precipitated from a slightly basic (aq) solution by bubbling oxygen through the solution, which converts fe(ii) to insoluble fe(iii): 4fe(oh)+(aq)+ 4oh-(aq)+o2(g)+2h2o(l)=4fe(oh)3(s)h ow many grams of o2 are consumed to precipitate all of the iron in 85ml of 0.075 m fe(ii).

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.