(a)[2]
Name one important industrial process in which iron is used as a catalyst, and name the product formed in this process. process product formed
(b(i))[1]
What colour does this precipitate have?
(b(ii))[3]
Write the ionic equation for this reaction, with state symbols.
(c(i))[1]
What role does potassium manganate(VII) play in this reaction?
(c(ii))[1]
What condition has to be used for this reaction to take place?
(c(iii))[1]
In electron-transfer terms, what happens to the iron(II) ions in this reaction?
(c(iv))[1]
State the colour change observed in this reaction. from purple to
(d)[2]
Deduce the charge on the iron ion in each compound below. $\text{FeF}_3$ $\text{Fe(NO}_3)_3$