Textbook Question
Classify each of the following unbalanced half-reactions as either an oxidation or a reduction. (d) SbCl4-(aq) → SbCl6-(aq)
Ch.4 - Reactions in Aqueous Solution
Chapter 4, Problem 45
The following two redox reactions occur between aqueous cations and solid metals. Will a solution of green cations react with solid blue metal? Explain.
(a)
(b)
Verified step by step guidance1
Identify the two redox reactions involved in the problem.
Determine the standard reduction potentials for each half-reaction from a standard reduction potential table.
Compare the reduction potentials of the green cations and the blue metal.
Use the Nernst equation or the concept of spontaneity to determine if the reaction will occur.
Conclude whether the green cations will react with the solid blue metal based on the comparison of reduction potentials.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Redox Reactions
Redox reactions, or reduction-oxidation reactions, involve the transfer of electrons between two species. In these reactions, one species is oxidized (loses electrons) while the other is reduced (gains electrons). Understanding the oxidation states of the reactants is crucial for predicting the direction of electron flow and determining whether a reaction will occur.
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Identifying Redox Reactions
Electrochemical Series
The electrochemical series is a list of elements arranged by their standard electrode potentials. It helps predict the feasibility of redox reactions by indicating which metals can displace others from their ionic forms in solution. A metal higher in the series can reduce the cations of a metal lower in the series, leading to a reaction, while the reverse is not possible.
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Aqueous Cations and Solid Metals
In the context of redox reactions, aqueous cations are positively charged ions dissolved in water, while solid metals are in their elemental form. The interaction between these two phases is essential for determining if a reaction will occur. The ability of the solid metal to donate electrons to the cations depends on its position in the electrochemical series relative to the cations involved.
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Related Practice
Textbook Question
Assume that the electrical conductivity of a solution depends on the total concentration of dissolved ions and that you measure the conductivity of three different solutions while carrying out titration procedures: (a) Begin with 1.00 L of 0.100 M KCl, and titrate by adding 0.100 M AgNO3. (b) Begin with 1.00 L of 0.100 M HF, and titrate by adding 0.100 M KOH. (c) Begin with 1.00 L of 0.100 M BaCl2, and titrate by adding 0.100 M Na2SO4. Which of the following graphs corresponds to which titration?
Textbook Question
Based on the positions in the periodic table, which of the following reactions would you expect to occur? (a) Red+ + Green → Red + Green+ (b) Blue + Green+ → Blue+ + Green (c) Red + Blue+ → Red+ + Blue
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