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Reactions of ions in aqueous solution (A-level only)

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Question 1

An aqueous solution containing [Fe(H2O)6]3+[Fe(H_2O)_6]^{3+}[Fe(H2​O)6​]3+ ions is mixed with aqueous sodium carbonate, Na2CO3Na_2CO_3Na2​CO3​. A brown precipitate forms alongside vigorous effervescence.

Which equation and description of the role of [Fe(H2O)6]3+[Fe(H_2O)_6]^{3+}[Fe(H2​O)6​]3+ correctly represent this reaction?

Equation: 2[Fe(H2O)6]3+(aq)+3CO32−(aq)→2[Fe(H2O)3(OH)3](s)+3CO2(g)+3H2O(l)2[Fe(H_2O)_6]^{3+}(aq) + 3CO_3^{2-}(aq) \rightarrow 2[Fe(H_2O)_3(OH)_3](s) + 3CO_2(g) + 3H_2O(l)2[Fe(H2​O)6​]3+(aq)+3CO32−​(aq)→2[Fe(H2​O)3​(OH)3​](s)+3CO2​(g)+3H2​O(l)

Role of [Fe(H2O)6]3+[Fe(H_2O)_6]^{3+}[Fe(H2​O)6​]3+: Brønsted–Lowry acid

Equation: 2[Fe(H2O)6]3+(aq)+3CO32−(aq)→2[Fe(H2O)3(OH)3](s)+3CO2(g)+3H2O(l)2[Fe(H_2O)_6]^{3+}(aq) + 3CO_3^{2-}(aq) \rightarrow 2[Fe(H_2O)_3(OH)_3](s) + 3CO_2(g) + 3H_2O(l)2[Fe(H2​O)6​]3+(aq)+3CO32−​(aq)→2[Fe(H2​O)3​(OH)3​](s)+3CO2​(g)+3H2​O(l)

Role of [Fe(H2O)6]3+[Fe(H_2O)_6]^{3+}[Fe(H2​O)6​]3+: Brønsted–Lowry base

Equation: 2[Fe(H2O)6]3+(aq)+3CO32−(aq)→Fe2(CO3)3(s)+12H2O(l)2[Fe(H_2O)_6]^{3+}(aq) + 3CO_3^{2-}(aq) \rightarrow Fe_2(CO_3)_3(s) + 12H_2O(l)2[Fe(H2​O)6​]3+(aq)+3CO32−​(aq)→Fe2​(CO3​)3​(s)+12H2​O(l)

Role of [Fe(H2O)6]3+[Fe(H_2O)_6]^{3+}[Fe(H2​O)6​]3+: Brønsted–Lowry acid

Equation: 2[Fe(H2O)6]3+(aq)+3CO32−(aq)→Fe2(CO3)3(s)+12H2O(l)2[Fe(H_2O)_6]^{3+}(aq) + 3CO_3^{2-}(aq) \rightarrow Fe_2(CO_3)_3(s) + 12H_2O(l)2[Fe(H2​O)6​]3+(aq)+3CO32−​(aq)→Fe2​(CO3​)3​(s)+12H2​O(l)

Role of [Fe(H2O)6]3+[Fe(H_2O)_6]^{3+}[Fe(H2​O)6​]3+: Electron pair donor

Reactions of ions in aqueous solution (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Reactions of ions in aqueous solution (A-level only)