Domanda del libro di testo
Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, write NR. (d) chromium metal is immersed in an aqueous solution of cobalt(II) chloride
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Ch.4 - Reactions in Aqueous Solution
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 4, Problema 57b
The metal cadmium tends to form Cd2+ ions. The following observations are made: (i) When a strip of zinc metal is placed in CdCl2(aq), cadmium metal is deposited on the strip. (ii) When a strip of cadmium metal is placed in Ni(NO3)(aq), nickel metal is deposited on the strip. (b) Which elements more closely define the position of cadmium in the activity series?
Guida verificata passo dopo passo1
Identify the reactions occurring in each observation. For (i), the reaction is: Zn(s) + Cd^{2+}(aq) \(\rightarrow\) Cd(s) + Zn^{2+}(aq). For (ii), the reaction is: Cd(s) + Ni^{2+}(aq) \(\rightarrow\) Ni(s) + Cd^{2+}(aq).
Determine the direction of electron flow in each reaction. In (i), zinc is oxidized to Zn^{2+} and cadmium is reduced to Cd. In (ii), cadmium is oxidized to Cd^{2+} and nickel is reduced to Ni.
Use the observations to infer the relative reactivity of the metals. Since zinc can displace cadmium from Cd^{2+}, zinc is more reactive than cadmium. Since nickel can displace cadmium from Cd^{2+}, nickel is more reactive than cadmium.
Position cadmium in the activity series based on its reactivity relative to zinc and nickel. Cadmium is less reactive than both zinc and nickel.
Conclude that the elements zinc and nickel more closely define the position of cadmium in the activity series, with cadmium being less reactive than both.
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Activity Series of Metals
The activity series is a list of metals ranked by their ability to displace other metals from solutions of their ions. More reactive metals, like zinc, can displace less reactive metals, such as cadmium, from their compounds. This series helps predict the outcomes of single displacement reactions and the relative reactivity of metals.
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Percorso guidato
02:02
Activity Series Chart
Redox Reactions
Redox (reduction-oxidation) reactions involve the transfer of electrons between substances, leading to changes in oxidation states. In the given observations, cadmium ions are reduced to cadmium metal, while zinc is oxidized, demonstrating the electron transfer that characterizes these reactions. Understanding redox processes is crucial for analyzing metal displacement.
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Percorso guidato
03:12Identifying Redox Reactions
Electrochemical Series
The electrochemical series is a list of standard electrode potentials for various half-reactions, indicating the tendency of a species to gain or lose electrons. Metals higher in the series are more likely to be oxidized, while those lower are more likely to be reduced. This concept is essential for determining the relative positions of cadmium, zinc, and nickel in the activity series.
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Percorso guidato
02:46Electrochemical Cells
Pratica correlata
Domanda del libro di testo
(a) Is the number of moles of ions present in a solution an intensive or an extensive property?
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Domanda del libro di testo
The following reactions (note that the arrows are pointing only one direction) can be used to prepare an activity series for the halogens:
Br2(aq) + 2 NaI(aq) → 2 NaBr(aq) + I2(aq)
Cl2(aq) + 2 NaBr(aq) → 2 NaCl(aq) + Br2(aq)
(a) Which elemental halogen would you predict is the most stable, upon mixing with other halides?
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Domanda del libro di testo
The metal cadmium tends to form Cd2+ ions. The following observations are made: (i) When a strip of zinc metal is placed in CdCl2(aq), cadmium metal is deposited on the strip. (ii) When a strip of cadmium metal is placed in Ni(NO3)(aq), nickel metal is deposited on the strip. (a) Write net ionic equations to explain each of the preceding observations.
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Domanda del libro di testo
Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, write NR. (e) hydrogen gas is bubbled through a solution of silver nitrate.
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Domanda del libro di testo
The following reactions (note that the arrows are pointing only one direction) can be used to prepare an activity series for the halogens:
Br2(aq) + 2 NaI(aq) → 2 NaBr(aq) + I2(aq)
Cl2(aq) + 2 NaBr(aq) → 2 NaCl(aq) + Br2(aq)
(b) Predict whether a reaction will occur when elemental chlorine and potassium iodide are mixed.
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