28. The free energy available from a 0.777-volt Cu(II)-Fe(II) cell under standard conditions isA.+75.0 kJB.-75.0 kJC.+150 kJD.-150 kJIf you want to nickel plate a stainless-steel spoon, you must attachA.bars nickel for both electrodes and the spoon in the anode compartmentB.bars nickel for both electrodes and the spoon in the cathode compartmentC.a bar of nickel to the anode and the spoon to the cathodeD.a bar of nickel to the cathode and the spoon to the anodeIf there is a single aqueous reactant for a voltaic cell,A.a concentration cell can be made from itB.it won't work without a second reactantC.there is no way voltage can be generatedD.there can't be any free energyA student makes a voltaic cell but forgets to include the salt bridge, then uses a voltmeter to measure the voltage. What will happen?A.The reaction will proceed much more slowly.B.The student may possibly suffer from an electric shock.C.Nothing- no reaction is possible.D.The reaction will happen only in one half-cell.For a voltaic cell based on the reaction below, which statement is correct? Cr(s)+3Ag+(aq)→Cr3+(aq)+3Ag(aq)A.The half-reaction at the anode is Cr3+(aq)+3e-→Cr(s).B.The half-reaction at the cathode is Ag+(aq)+e-→Ag(s).C.Chromium oxidizes silver.D.Silver is the reducing agent.

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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28. The free energy available from a 0.777-volt Cu(II)-Fe(II) cell under standard conditions is

A.	+75.0 kJ
B.	-75.0 kJ
C.	+150 kJ
D.	-150 kJ

If you want to nickel plate a stainless-steel spoon, you must attach

A.	bars nickel for both electrodes and the spoon in the anode compartment
B.	bars nickel for both electrodes and the spoon in the cathode compartment
C.	a bar of nickel to the anode and the spoon to the cathode
D.	a bar of nickel to the cathode and the spoon to the anode

If there is a single aqueous reactant for a voltaic cell,

A.	a concentration cell can be made from it
B.	it won't work without a second reactant
C.	there is no way voltage can be generated
D.	there can't be any free energy

A student makes a voltaic cell but forgets to include the salt bridge, then uses a voltmeter to measure the voltage. What will happen?

A.	The reaction will proceed much more slowly.
B.	The student may possibly suffer from an electric shock.
C.	Nothing- no reaction is possible.
D.	The reaction will happen only in one half-cell.

For a voltaic cell based on the reaction below, which statement is correct? Cr(s)+3Ag⁺(aq)→Cr³⁺(aq)+3Ag(aq)

A.	The half-reaction at the anode is Cr³⁺(aq)+3e^-→Cr(s).
B.	The half-reaction at the cathode is Ag⁺(aq)+e^-→Ag(s).
C.	Chromium oxidizes silver.
D.	Silver is the reducing agent.

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