Domanda del libro di testo
Consider the equilibrium B(aq) + H2O(l) ⇌ HB+(aq) + OH–(aq). Suppose that a salt of HB+(aq) is added to a solution of B(aq) at equilibrium. (c) Will the pH of the solution increase, decrease, or stay the same?
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Ch.17 - Additional Aspects of Aqueous Equilibria
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 17, Problema 12
Three cations, Ni2+ , Cu2+ , and Ag+, are separated using two different precipitating agents. Based on Figure 17.23, what two precipitating agents could be used? Using these agents, indicate which of the cations is A, which is B, and which is C.[Section 17.7]
Guida verificata passo dopo passo1
Identify the solubility rules and common precipitating agents for the cations Ni2+, Cu2+, and Ag+ from the textbook or reliable chemistry resources.
Consult Figure 17.23 to observe the behavior of each cation with different precipitating agents. Note which agents cause precipitation with which cations.
Select two precipitating agents that can effectively separate the three cations based on their ability to selectively precipitate one or more of the cations while leaving others in solution.
Assign the labels A, B, and C to the cations Ni2+, Cu2+, and Ag+ based on the order of their precipitation or remaining in solution as indicated in Figure 17.23.
Summarize the separation process, detailing which cation precipitates with which agent and the sequence of adding these agents to achieve complete separation.
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Precipitation Reactions
Precipitation reactions occur when two soluble salts react to form an insoluble compound, known as a precipitate. This process is driven by the formation of a solid that separates from the solution, which can be influenced by factors such as solubility rules and the concentrations of the reactants. Understanding these reactions is crucial for identifying which cations can be separated using specific precipitating agents.
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01:53
Selective Precipitation
Solubility Rules
Solubility rules are guidelines that predict the solubility of various ionic compounds in water. These rules help chemists determine which compounds will remain dissolved and which will precipitate out of solution. For the cations Ni<sup>2+</sup>, Cu<sup>2+</sup>, and Ag<sup>+</sup>, knowing their solubility with different anions is essential for selecting appropriate precipitating agents.
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00:28Solubility Rules
Cation Identification
Cation identification involves using specific tests or reactions to distinguish between different cations in a mixture. This can be achieved through selective precipitation, where certain cations are precipitated out using specific reagents, allowing for their identification based on the order of precipitation and the characteristics of the resulting precipitates. This concept is key to solving the question regarding which cation corresponds to which precipitating agent.
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00:31Cation Solubility
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Domanda del libro di testo
Ca1OH22 has a Ksp of 6.5 * 10-6. (b) If 50 mL of the solution from part (a) is added to each of the beakers shown here, in which beakers, if any, will a precipitate form? In those cases where a precipitate forms, what is its identity? [Section 17.6]
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Domanda del libro di testo
The following graphs represent the behavior of BaCO3 under different circumstances. In each case, the vertical axis indicates the solubility of the BaCO3 and the horizontal axis represents the concentration of some other reagent. (a) Which graph represents what happens to the solubility of BaCO3 as HNO3 is added? [Section 17.5]
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Domanda del libro di testo
Which of these statements about the common-ion effect is most correct? (a) The solubility of a salt MA is decreased in a solution that already contains either M+ or A-. (b) Common ions alter the equilibrium constant for the reaction of an ionic solid with water. (c) The common-ion effect does not apply to unusual ions like SO32 - . (d) The solubility of a salt MA is affected equally by the addition of either A- or a noncommon ion.
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