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WorksheetsElectrolytic cell and electrochemical series and the nernst
Total questions: 12
Worksheet time: 10mins
which of the following statements is false?
Oxidation and reduction half-reactions occur at electrodes in electrochemical cells
All electrochemical reactions involve the transfer of electrons
reduction occurs at the cathode
oxidation occurs at the anode
All voltaic (galvanic) cells involve the use electricity to initiate nonspontaneous chemical reactions
Which of the following is non-spontaneous in....
A galvanic
Both galvanic and electrolytic cells
a electrolytic cell
Hydrogen gas is not liberated when the following metal is added to dilute HCl.
Mg
Sn
Ag
Zn
The reduction potential of an elements A is 1.71 V. What can be concluded from this?
A will lose electrons easily
A will undergo reduction easily
A will undergo oxidation easily
A will be a good reducing agent
What is an electrolytic cell?
a cell that converts chemical energy into electrical energy
a cell that converts electrical energy into electrical energy
a cell that converts electrical energy into chemical energy
A cell that converts kinetic energy into potential energy.
What conditions are necessary to directly measure a standard electrode potential (Eo)?
I. A half-cell with an electrode in 1.0 M solutions of its ions.
II. Connection to standard hydrogen electrode.
III. Voltmeter between half-cells to measure potential difference
I and II
I and III
II and III
I, II and III
Given the standard electrode potentials,
K+/K = -2.93 V
Ag+/Ag = 0.80 V
Hg2+/Hg = 0.79 V
Mg2+/Mg = -2.37 V
Cr3+/Cr = -0.74 V
Arrange them into their increasing order of reducing power
K > Mg > Cr > Hg > Ag
Ag > Hg > Cr > Mg > K
Ag < Hg < Cr < Mg < K
K < Mg < Cr < Hg < Ag
The reaction of a cell is:
Mg (s) + Cu2+ (aq) ↔ Cu (s) + Mg2+
(aq)
If the standard reduction potentials of Mg and
Cu are -2.37 and +0.34 V respectively. The
emf of the cell is,
2.03 V
-2.03 V
+2.71V
-2.71V
What is the value of cell potential, E cell for the half-cell below, if E0cell is 1.49V:
MnO4- (0.010) + 8H+ (0.20M) + 5e- → Mn2+ (0.020M) + 4H2O?
1.50V
1.86V
1.42V
1.58V
1.52V
Represent the cell in which the following reaction takes place Mg (s) + 2Ag+(aq) (0.0001M) → Mg2+ (aq) (0.130M) + 2Ag (s)
Calculate the cell potential, Eo cell = 3.17 V
2.96 V
2.70 V
3.30 V
2.88 V
Which of the following is not a similarity between voltaic and electrolytic cells?
electrons flow from anode to cathode
reduction occurs at cathode
oxidation occurs at anode
charges on anode and cathode are the same
