What is the colour of iron ions?Iron(II) ion greenIron(III) ion yellowRust (Iron oxide + water) black or brownExplain why the rust of iron is not green or yellow, but black or brown.
I put one on my Mazdaspeed3 yesterday w/ a larger turbo inlet hose and tune. 11hp gain and I can feel the power increase
You'll never know for sure until you have a dyno test done. Nobody can answer what you are asking here.
After everybody is said what they say, I'll just add, you car came from the factory with it's own cold air intake, every car comes that way. You wasted money on what the people selling this stuff told you.
Actually, the iron(III) ion, [Fe(H2O)6]3+, is an extremely pale purplish colour, as you will see if you grow a crystal of iron ammonium alum, NH4Fe(SO4)2.12H2O.This is because the ion is high spin d5, meaning that d-d transitions are spin-forbidden, and therefore even weaker than usual. The yellow colour of iron(III) in solution is due to species such as [Fe(III)(H2O)5OH]2+, which absorb strongly in the blue-near UV through charge transfer transitions, in which an electron is transferred from a coordinated anion to the reducible central ion. Compare the deep purple colour of permanganate, which has a highly irreducible central ion, but no d electrons at all. The pale green colour of Fe(II) is due to d-d transitions. The reason why the d orbitals are not degenerate in transition metal complexes is that they interact to different extents with the coordinated groups. Remember that when we talk about Fe2+ in aqueous solution, this is really just a lazy way of referring to the [Fe(H2O)6]2+ complex ion. The strong colours of iron oxides are due to charge transfer, including in some cases, such as magnetite, charge transfer between iron(II) and iron(III) in slightly different environments. Intervalence charge transfer of this kind is also responsible for the extremely deep colour of Prussian Blue.
