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Ch.5 - Introduction to Solutions and Aqueous Solutions
Tro - Chemistry: A Molecular Approach 5th Edition
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTro 5th EditionCh.5 - Introduction to Solutions and Aqueous SolutionsProblema 41
Capitolo 5, Problema 41

Determine whether each compound is soluble or insoluble. If the compound is soluble, list the ions present in solution. a. AgNO3 b. Pb(C2H3O2)2 c. KNO3 d. (NH4)2S

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Identify the solubility rules for common ionic compounds in water. Nitrates (NO_3^-) and acetates (C_2H_3O_2^-) are generally soluble, while sulfides (S^2-) are often insoluble except with certain cations.
For AgNO_3: According to solubility rules, nitrates are soluble. Therefore, AgNO_3 is soluble in water. The ions present in solution are Ag^+ and NO_3^-.
For Pb(C_2H_3O_2)_2: Acetates are generally soluble, so Pb(C_2H_3O_2)_2 is soluble in water. The ions present in solution are Pb^2+ and C_2H_3O_2^-.
For KNO_3: Nitrates are soluble, and potassium compounds are also soluble. Therefore, KNO_3 is soluble in water. The ions present in solution are K^+ and NO_3^-.
For (NH_4)_2S: Ammonium compounds are generally soluble, so (NH_4)_2S is soluble in water. The ions present in solution are NH_4^+ and S^2-.

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Solubility Rules

Solubility rules are guidelines that help predict whether a compound will dissolve in water. They state that certain ions, such as alkali metal ions and nitrate ions, are generally soluble, while others, like lead(II) and silver ions, often form insoluble compounds. Understanding these rules is essential for determining the solubility of various compounds in aqueous solutions.
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Solubility Rules

Ionic Compounds in Solution

When ionic compounds dissolve in water, they dissociate into their constituent ions. For example, when silver nitrate (AgNO3) dissolves, it separates into Ag+ and NO3- ions. Recognizing how compounds break down into ions in solution is crucial for identifying the ions present in soluble compounds.
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Ionic Compounds Naming

Ammonium Compounds

Ammonium compounds, such as (NH4)2S, are typically soluble in water due to the presence of the ammonium ion (NH4+), which is known for its solubility. This concept is important when evaluating the solubility of compounds containing ammonium, as they often behave differently compared to other cations.
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Ionic Compounds Naming
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