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Chem 116 Post Exam 3

Oxidation loss of electrons
Reduction gain of electrons
Oxidation agent species that is reduced
Reduction agent species that is oxidized
For an atom in elemental form, what is the oxidation number? 0
What determines the concentration of an oxidizing agent from the known concentration of the reduction agent? redox titration
Generally, metal is the ______ agent and nonmetal is the ______ agent reducing; oxidizing
Voltaic cell: uses a spontaneous reaction to generate electrical energy (delta G>0)
Electrolytic cell: uses electrical energy to drive nonspontaneous reaction (delta G<0)
Oxidation half reaction occurs in the... anode
Reduction half reaction occurs in the... cathode
Anode has _______ charge; Cathode has _______ charge negative; positive
Joins half cells allowing ions to flow through both compartments and complete the circuit salt bridge
Cell potential (Ecell) Electrical potential between the two electrodes (voltage)
For a spontaneous process, Ecell... >0
standard Ecell =standard E (cathode/reduction) - standard E (anode/oxidation)
As E(half cell) increases, oxidizing agent ________; reducing agent __________ increases; decreases
As E(half cell) decreases, oxidizing agent ________; reducing agent __________ decreases; increases
Self contained voltaic cells arranged in a series so that their individual voltages are added batteries
As cell operates, it's potential ___________ decreases
In electrolysis of pure molten salts, __________ will be reduces and __________will be oxidized cation; anion
Positive electrode potential corresponds to _______ reduction
Negative electrode potential corresponds to _______ oxidation
Steps to balance redox reactions: 1. Separate into half reaction 2. Balance atoms other than O and H 3. Balance O by adding H2O 4. Balance H by adding H+ 5. Balance charges with e- 6. Multiply each half reactions so that e- are equal
Created by: jkmccord11



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