The net ionic equation Fe^ 3+ (aq)+3 OH^- (aq) Fe(OH)_3 (s) results when two soluble…

CHEMISTRY · Single correct · A Level · Chemistry · Reactions of ions in aqueous solution · Reactions of ions in aqueous solution

Problem

The net ionic equation Fe3+(aq)+3OH−(aq)→Fe(OH)3(s)\mathrm{Fe^{3+}}(aq)+3\mathrm{OH^-}(aq)\rightarrow \mathrm{Fe(OH)_3}(s) results when two soluble solutions are combined. Which balanced molecular equation below would give rise to this net ionic equation? (a) FeCl3(aq)+3KOH(aq)→Fe(OH)3(aq)+3KCl(aq)\mathrm{FeCl_3}(aq)+3\mathrm{KOH}(aq)\rightarrow \mathrm{Fe(OH)_3}(aq)+3\mathrm{KCl}(aq) (b) Fe(NO3)3(aq)+3KOH(aq)→Fe(OH)3(s)+3KNO3(aq)\mathrm{Fe(NO_3)_3}(aq)+3\mathrm{KOH}(aq)\rightarrow \mathrm{Fe(OH)_3}(s)+3\mathrm{KNO_3}(aq) (c) FeCl2(aq)+2KOH(aq)→Fe(OH)2(s)+2KCl(aq)\mathrm{FeCl_2}(aq)+2\mathrm{KOH}(aq)\rightarrow \mathrm{Fe(OH)_2}(s)+2\mathrm{KCl}(aq) (d) Fe2(SO4)3(aq)+6KOH(aq)→2Fe(OH)3(s)+3K2SO4(s)\mathrm{Fe_2(SO_4)_3}(aq)+6\mathrm{KOH}(aq)\rightarrow 2\mathrm{Fe(OH)_3}(s)+3\mathrm{K_2SO_4}(s)

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