A particulate representation shows purple spheres labeled (Fe ) dispersed in water in…

CHEMISTRY · Single correct · AP · Chemistry · Chemical Reactions · Chemical Reactions

Problem

A particulate representation shows purple spheres labeled 3+3+ (Fe3+^{3+}) dispersed in water in one beaker and small red–white clusters labeled −- (OH−^{-}) in another. After mixing, a brown solid consisting of Fe and O atoms in a 1 : 3 ratio forms and settles out; no other changes are apparent. Which of the following net ionic equations accurately represents the chemical change and conserves both mass and charge? (a) 2 Fe3+(aq)+6 OH−(aq)  →  Fe2O3(s)+3 H2O(l)2\,\text{Fe}^{3+}(\text{aq})+6\,\text{OH}^-(\text{aq})\;\rightarrow\;\text{Fe}_2\text{O}_3(\text{s})+3\,\text{H}_2\text{O}(\text{l}) (b) Fe3+(aq)+OH−(aq)  →  Fe(OH)3(s)\text{Fe}^{3+}(\text{aq})+\text{OH}^-(\text{aq})\;\rightarrow\;\text{Fe(OH)}_3(\text{s}) (c) Fe3+(aq)+3 OH−(aq)  →  Fe(OH)3(s)\text{Fe}^{3+}(\text{aq})+3\,\text{OH}^-(\text{aq})\;\rightarrow\;\text{Fe(OH)}_3(\text{s}) (d) Fe3+(aq)+OH−(aq)  →  FeOH2+(aq)\text{Fe}^{3+}(\text{aq})+\text{OH}^-(\text{aq})\;\rightarrow\;\text{FeOH}^{2+}(\text{aq})

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