Homework Answers
a) total charge is q = i*t = 0.5*1*60*60 = 1800 C
b) each electron has a charge 1.6*10^-19 C
then no.of ions required is 1800/(1.6*10^-19) = 1.125*10^22
C) mass of silver atom is 107.9*1.66*10^-27 kg
total mass is m = 1.125*10^22*107.9*1.66*10^-27
m = 2.01*10^-3 Kg
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An electrochemical cell consists of two silver electrodes placed in aqueous solution of silver nitrate. The...
Identify the components of the electrolytic electrochemical cell below, placing the anode on the left and...
Identify the components of the electrolytic electrochemical cell below, placing the anode on the left and the cathode on the right. Use the terms salt bridge, zinc nitrate solution, copper nitrate solution, copper electrode, and zinc electrode. Also, label the electrodes as + and - A С E Direction of electron flow (circle one): A to B B to A or Direction of cation flow through salt bridge: C to D D to C or Label the electrodes on the...
Identify the components of the electrolytic electrochemical cell below, placing the anode on the left and...
Identify the components of the electrolytic electrochemical cell below, placing the anode on the left and the cathode on the right. Use the terms salt bridge, zinc nitrate solution, copper nitrate solution, copper electrode, and zinc electrode. Also, label the electrodes as + and - A C E Direction of electron flow (circle one): A to B B to A or Direction of cation flow through salt bridge: E C to D D to C or Label the electrodes on...
7. You decide to construct a zinc/aluminum galvanic cell in which the electrodes are connected by...
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•A bar of silver is placed in a solution of sodium nitrate. A graphite rod is...
•A bar of silver is placed in a solution of sodium nitrate. A graphite rod is used as the other electrode. A constant current of 500 milliamps is passed for 6.00 hours through a liter of solution. Water is reduced at the graphite cathode. 2H2O +2e-→ H2 +2OH- When the run is over, what is the concentration of silver ion?
Consider an electrochemical cell constructed from the following half cells, linked by a KCl salt bridge....
Consider an electrochemical cell constructed from the following half cells, linked by a KCl salt bridge. a Fe electrode in 1.0 M FeCl2 solution a Sn electrode in 1.0 M Sn(NO3)2 solution Fe2+ + 2e- → Fe Eo = -0.44 V Sn2+ + 2e- → Sn Eo = -0.14 V When the cell is running spontaneously, which choice includes only true statements and no false ones? Select one: a. The iron electrode gains mass and the iron electrode is the...
Use the References to access important values if needed for this question An electrochemical cell consists...
Use the References to access important values if needed for this question An electrochemical cell consists of a Pt/H(aq,1.00 M) H (8) cathode connected to a Pt/H(aq)|Hz(8) anode in which the H concentration is that of a buffer consisting of a weak acid, HA(0.117 M), mixed with its conjugate base, A (0.193 M). The measured cell voltage is Ecell -0.169 V at 25 °C, with Pt. -1.00 atm at both electrodes. Calculate the pH in the buffer solution and the...
The electrochemical cell represented in consists of two electrodes. One is solid NiO/Ni mixture, other is...
The electrochemical cell represented in consists of two
electrodes. One is solid NiO/Ni mixture, other is gaseous O2
electrode. The porous platinum coating also acts as a catalyst. The
electrolyte is a ZrO2/Y2O3 solid solution that conducts oxygen ions
between the oxygen side and the
NiO/Ni side. The standard free energy of reaction for Ni+1/2
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What is the open circuit voltage at 1000 K when the oxygen
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A copper/magnesium electrochemical cell was constructed.
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Part A through H 1. [60 pts) A galvanic cell is a type of battery where...
Part A through H
1. [60 pts) A galvanic cell is a type of battery where the electrodes are immersed in different electrolyte solutions, which are connected by an ion-conducting bridge. Consider a galvanic cell with Al and Cu electrodes. The Al electrode is immersed in a solution containing a standard concentration of Al3+ ions and the Cu electrode is immersed in a solution containing a standard concentration of Cu* ions. External Circuit The standard reduction potentials for the half...
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In a copper-zinc voltaic cell, one half-cell consists of a ZnZn
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half-cell consists of a CuCu electrode inserted in a copper sulfate
solution. These two half-cells are separated by a salt bridge.
At the zinc electrode (anode), ZnZn metal undergoes oxidation by
losing two electrons and enters the solution as Zn2+Zn2+ ions. The
oxidation half-cell reaction that takes place at the anode is
Zn(s)→Zn2+(aq)+2e−Zn(s)→Zn2+(aq)+2e−
The CuCu ions undergo reduction...
Identify the components of the electrolytic electrochemical cell below, placing the anode on the left and the cathode on the right. Use the terms salt bridge, zinc nitrate solution, copper nitrate solution, copper electrode, and zinc electrode. Also, label the electrodes as + and - A С E Direction of electron flow (circle one): A to B B to A or Direction of cation flow through salt bridge: C to D D to C or Label the electrodes on the...
Identify the components of the electrolytic electrochemical cell below, placing the anode on the left and the cathode on the right. Use the terms salt bridge, zinc nitrate solution, copper nitrate solution, copper electrode, and zinc electrode. Also, label the electrodes as + and - A C E Direction of electron flow (circle one): A to B B to A or Direction of cation flow through salt bridge: E C to D D to C or Label the electrodes on...
7. You decide to construct a zinc/aluminum galvanic cell in which the electrodes are connected by a wire and the solutions are connected with a salt bridge. One electrode consists of an aluminum bar in a 1.0 M solution of aluminum nitrate. The other electrode consists of zinc bar in a 1.0 M solution of zinc nitrate. Draw the complete electrochemical cell diagram and use it to answer the questions that follow. a. Which electrode is the cathode and which...
Use the References to access important values if needed for this question An electrochemical cell consists of a Pt/H(aq,1.00 M) H (8) cathode connected to a Pt/H(aq)|Hz(8) anode in which the H concentration is that of a buffer consisting of a weak acid, HA(0.117 M), mixed with its conjugate base, A (0.193 M). The measured cell voltage is Ecell -0.169 V at 25 °C, with Pt. -1.00 atm at both electrodes. Calculate the pH in the buffer solution and the...
The electrochemical cell represented in consists of two
electrodes. One is solid NiO/Ni mixture, other is gaseous O2
electrode. The porous platinum coating also acts as a catalyst. The
electrolyte is a ZrO2/Y2O3 solid solution that conducts oxygen ions
between the oxygen side and the
NiO/Ni side. The standard free energy of reaction for Ni+1/2
O2--> NiO is ?G=-244,550+98.5 T (J) (where T is in Kelvin)
What is the open circuit voltage at 1000 K when the oxygen
pressure on...
A copper/magnesium electrochemical cell was constructed.
EXPERIMENT S Volumetric Analysi Acid-Bse Titration Part Il: Answer each of the following questions about the copper/magnesium electrochemical cell you built in this experiment. Answer for the single cell, do not worry about the series configuration. 65 Copper Which electrode is the cathode? Magnesium Copper Which electrode is the anode? 2 Magnesium 3. Write the equation for the half-reaction that occurs at the copper electrode, and indicate whether it is an oxidation or a...
Part A through H
1. [60 pts) A galvanic cell is a type of battery where the electrodes are immersed in different electrolyte solutions, which are connected by an ion-conducting bridge. Consider a galvanic cell with Al and Cu electrodes. The Al electrode is immersed in a solution containing a standard concentration of Al3+ ions and the Cu electrode is immersed in a solution containing a standard concentration of Cu* ions. External Circuit The standard reduction potentials for the half...
In a copper-zinc voltaic cell, one half-cell consists of a ZnZn
electrode inserted in a solution of zinc sulfate and the other
half-cell consists of a CuCu electrode inserted in a copper sulfate
solution. These two half-cells are separated by a salt bridge.
At the zinc electrode (anode), ZnZn metal undergoes oxidation by
losing two electrons and enters the solution as Zn2+Zn2+ ions. The
oxidation half-cell reaction that takes place at the anode is
Zn(s)→Zn2+(aq)+2e−Zn(s)→Zn2+(aq)+2e−
The CuCu ions undergo reduction...
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