Other redox reactions are not spontaneous Mg2+ Mg2+ Mg2+
Mg2+
Mg2+ Mg2+
Experiments can be run…
…and the results can be summarized in tables like the one below
Redox table (standard reduction potentials table): A table listing standard reduction potentials of common oxidizing agents and reducing agents in order from strongest to weakest p.729-730 of your textbook
The Spontaneity Rule
Example • Use the redox table to predict whether the following reactions will be spontaneous: a) Cr (s) + NiSO4 (aq) ? b) Ag(s) + Pb(NO3)2 (aq) ?
Predicting Redox Reactions Using a Redox Table 1. List all of the entities present 2. Classify the entities as either oxidixing agents (left side of the table) or reducing agents (right side of the table) 3. Identify the strongest oxidizing agent (top left) and the strongest reducing agent (bottom right) 4. Predict whether the reaction is spontaneous 5. Write the half-reaction equations (reverse the direction of the oxidation reaction) 6. Use multipliers to balance the electrons 7. Combine the half reactions to give the overall equation
Example • A strip of tin is placed in a solution of silver nitrate
Practice • Iodic acid is poured into an aluminum pop can
Practice • Tin (II) bromide solution is poured into acidified sodium dichromate solution
HOMEWORK Required Reading: p. 618-623 (remember to supplement your notes!)
Write the half-reaction equations (reverse the direction of the oxidation reaction). 6. Use multipliers to balance the electrons. 7. Combine the half reactions to give ...
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The reaction rate in units of reactions/second can be computed by multiplying RR by the material volume. In similar fashion, the total number of reactions can be ...
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iron atoms. Bloom's Level: 5. Evaluate. Difficulty: Medium. Gradable: automatic. Subtopic: The Mole (Definition and Avogadro's Number). Topic: Chemical Calculations. 8. How many moles of chloroethylene (C2H3Cl) contain 5.47 Ã 1026 molecules? A. 3.29
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Lesson: Nitrogen Containing. Functional Groups. Unit-2: Reactions of Amines. Lesson Developer: Dr. S.P Bhutani. College/Dept: Formerly Associate Professor. Department of Chemistry. Rajdhani College, University of Delhi. Lesson Editor:Dr.N.K Gautam. A
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