Electrochemistry Review

Quiz
•
Chemistry
•
11th - 12th Grade
•
Hard
+5
Standards-aligned
Caroline Duesing
Used 160+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
AlF6 3– + 3 e– → Al + 6 F– 1
Which of the following occurs in the reaction?
AlF63– is reduced at the cathode.
Al is oxidized at the anode.
Aluminum is converted from the –3 oxidation state to the 0 oxidation state.
Aluminum is converted from the –3 oxidation state to the 0 oxidation state.
Tags
NGSS.HS-PS1-2
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
AlF6 3– + 3 e– → Al + 6 F– 1
A steady current of 10 amperes is passed though an aluminum-production cell for 15 minutes. Which of the following is the correct expressions for calculating the number of grams of aluminum produced? (1 faraday = 96,500 coulombs)
Tags
NGSS.HS-PS1-7
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Fe2+ + 2e– → Fe(s) E° = –0.44 volt
Ni2+ + 2e– → Ni(s) E° = –0.23 volt
The standard reduction potentials for two half reactions are given above. The Nernst equation for a galvanic cell at 25°C in which Fe(s) reduces Ni2+ is the following.
E = E° – 0.03 log [Fe2+]/[Ni2+]
What is the equilibrium constant for the reaction below?
Fe(s) + Ni2+ → Fe2+ + Ni(s)
1.9 × 10–23
7.6 × 10–8
3.6 × 103
1.3 × 107
Tags
NGSS.HS-PS1-2
NGSS.HS-PS1-6
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which of the following best represents a reaction in which the same reactant undergoes both oxidation and reduction?
S8(s) + 8 O2(g) → 8 SO2(g)
H2SeO4(aq) + 2 Cl–(aq) + 2 H+(aq) → H2SeO3(aq) + Cl2(g) + H2O(l)
3 Br2(aq) + 6 OH–(aq) → 5 Br– (aq) + BrO3 – (aq) + 3 H2O(l)
PtCl4(s) + 2 Cl– (aq) → PtCl62– (aq)
Tags
NGSS.HS-PS1-2
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
A redox reaction has an equilibrium constant of
K = 2.6 x 105. Which of the following statements best represents the algebraic signs of Eocell and Gorxn for this reaction?
Eocell is positive and Gorxn is positive.
Eocell is negative and Gorxn is negative.
Eocell is positive and Gorxn is negative.
Eocell is negative and Gorxn is positive.
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following statements applies to the change in mass of the electrodes involved in this electrochemical cell?
Electrode A is the anode and it gains mass
since metal ions are being converted to metal
atoms which often adhere to the electrode.
Electrode B is the anode and it gains mass
since metal ions are being converted to metal
atoms which often adhere to the electrode.
Electrode A is the cathode and it gains mass since metal ions are being converted to metal atoms which often adhere to the electrode.
Electrode B is the cathode and it gains mass since metal ions are
being converted to metal atoms which often adhere to the electrode.
Tags
NGSS.HS-PS1-2
NGSS.HS-PS1-7
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which of the following best describes this electrochemical cell?
Electrode A is the anode since anions are present in its half-cell and the current flows from cathode to anode.
Electrode C is the cathode since cations are present in its half-cell and the current flows from anode to cathode.
Electrode A is the anode and Electrode C is the cathode since the current always flows from cathode to anode.
Electrode C is the anode and Electrode A is the cathode since the current always flows from anode to cathode.
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