Chem 116 A Grade Exam with Questions &
Correct Verified Answers
The more negative DeltaG is for a given reaction, the larger the value of the corresponding
equilibrium constant, K. - ✔✔True
The gain of electrons by an element I called - ✔✔Reduction
____ is reduced in Cr2O7+6S2O3+14H -> 2Cr +3S4O6+7H2O - ✔✔Cr 6+
____ is the oxisizing agent in Cr2O7+6S2O3+14H -> 2Cr +3S4O6+7H2O - ✔✔Cr2O7 2-
Which substance is serving as the reducing agent in the following 14H+Cr2O7+3Ni -> 3Ni+2Cr+7H2O -
✔✔Ni
Which substance is the reducing agent in the reaction Pb+PbO2+2H2So4 -> 2PbSO4+2H2O - ✔✔Pb
What is the oxidation number of chromium in Cr2O7 ion? - ✔✔+6
What is the oxidation number of potassium in KMnO4? - ✔✔+1
What is the oxidation number of manganese in the MnO4 1- ion? - ✔✔+7
What is the oxidation number of manganese in MnO2? - ✔✔+4
, ___ electrons appear in the following half-reaction when it is balanced S4O6 -> 2SO3 - ✔✔2
The balanced half-reaction in which chlorine gas s reduced to the aqueous chloride ion is a ____ process.
- ✔✔six-electron
The balanced half-reaction in which dichromate ion is reduced to chromium metal is a ____ process. -
✔✔twelve-electron
The balanced half-reaction in which dichromate ion is reduced to chromium (III) ion is a +____ process. -
✔✔six-electron
The balanced half-reaction in which sulfate ion is reduced to sulfite ion is a ___ process. -
✔✔two-electron
The electrode at which oxidation occurs is called the - ✔✔anode
The half-reaction occurng at the anode in the alanced reaction shown below is ___. 3MnO4+24H+5Fe ->
3Mn+5Fe+12H2O - ✔✔Fe(s)->Fe 3+(aq) + 3e-
In a voltaic cell, electrons flow from the ___ to the ___. - ✔✔anode, cathode
The reduction half-reaction occurring in the standard hydrogen electrode is ___. - ✔✔2H+(aq, 1M)
+ 2e- -> H2 (g, 1atm)
1V = ___? - ✔✔1 J/C
The more ___ the value of Ered, the greater the driving force for reduction. - ✔✔positive
The relationship between the change in Gibbs free energy and the emf of an electrochemical cell is given
by ___. - ✔✔DeltaG = -nFE
Correct Verified Answers
The more negative DeltaG is for a given reaction, the larger the value of the corresponding
equilibrium constant, K. - ✔✔True
The gain of electrons by an element I called - ✔✔Reduction
____ is reduced in Cr2O7+6S2O3+14H -> 2Cr +3S4O6+7H2O - ✔✔Cr 6+
____ is the oxisizing agent in Cr2O7+6S2O3+14H -> 2Cr +3S4O6+7H2O - ✔✔Cr2O7 2-
Which substance is serving as the reducing agent in the following 14H+Cr2O7+3Ni -> 3Ni+2Cr+7H2O -
✔✔Ni
Which substance is the reducing agent in the reaction Pb+PbO2+2H2So4 -> 2PbSO4+2H2O - ✔✔Pb
What is the oxidation number of chromium in Cr2O7 ion? - ✔✔+6
What is the oxidation number of potassium in KMnO4? - ✔✔+1
What is the oxidation number of manganese in the MnO4 1- ion? - ✔✔+7
What is the oxidation number of manganese in MnO2? - ✔✔+4
, ___ electrons appear in the following half-reaction when it is balanced S4O6 -> 2SO3 - ✔✔2
The balanced half-reaction in which chlorine gas s reduced to the aqueous chloride ion is a ____ process.
- ✔✔six-electron
The balanced half-reaction in which dichromate ion is reduced to chromium metal is a ____ process. -
✔✔twelve-electron
The balanced half-reaction in which dichromate ion is reduced to chromium (III) ion is a +____ process. -
✔✔six-electron
The balanced half-reaction in which sulfate ion is reduced to sulfite ion is a ___ process. -
✔✔two-electron
The electrode at which oxidation occurs is called the - ✔✔anode
The half-reaction occurng at the anode in the alanced reaction shown below is ___. 3MnO4+24H+5Fe ->
3Mn+5Fe+12H2O - ✔✔Fe(s)->Fe 3+(aq) + 3e-
In a voltaic cell, electrons flow from the ___ to the ___. - ✔✔anode, cathode
The reduction half-reaction occurring in the standard hydrogen electrode is ___. - ✔✔2H+(aq, 1M)
+ 2e- -> H2 (g, 1atm)
1V = ___? - ✔✔1 J/C
The more ___ the value of Ered, the greater the driving force for reduction. - ✔✔positive
The relationship between the change in Gibbs free energy and the emf of an electrochemical cell is given
by ___. - ✔✔DeltaG = -nFE
