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Ch.4 - Reactions in Aqueous Solution
Brown - Chemistry: The Central Science 15th Edition
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Tutti i libri di testoBrown 15th EditionCh.4 - Reactions in Aqueous SolutionProblema 17a
Capitolo 4, Problema 17a

Specify what ions are present in solution upon dissolving each of the following substances in water: a. FeCl2

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Identify the compound: FeCl2 is iron(II) chloride.
Determine the ions formed: When FeCl2 dissolves in water, it dissociates into its constituent ions.
Write the dissociation equation: FeCl2 (s) → Fe^{2+} (aq) + 2 Cl^{-} (aq).
Recognize the ions in solution: The ions present in the solution are Fe^{2+} and Cl^{-}.
Note the stoichiometry: For each formula unit of FeCl2, one Fe^{2+} ion and two Cl^{-} ions are produced.

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Dissociation of Ionic Compounds

When ionic compounds like FeCl2 dissolve in water, they dissociate into their constituent ions. This process occurs because the polar water molecules surround and separate the individual ions, allowing them to disperse throughout the solution.
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Ionic Compounds Naming

Ionic Composition of FeCl2

FeCl2 is composed of iron (Fe) and chloride (Cl) ions. Specifically, it contains one iron ion with a +2 charge (Fe²⁺) and two chloride ions, each with a -1 charge (Cl⁻). Understanding this composition is crucial for identifying the ions present in solution.
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Matter Composition

Electrolytes in Solution

Electrolytes are substances that dissociate into ions in solution and can conduct electricity. The presence of Fe²⁺ and Cl⁻ ions from the dissociation of FeCl2 makes the solution an electrolyte, which is important for various chemical and biological processes.
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Electrolytes and Strong Acids
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