Concept explainers
(a)
Interpretation:
The oxidation half cell and the reduction half cell for the given unbalance redox reactions is to be written.
Concept Introduction:
When the oxidation state of a substance increases by losing electrons, it is termed as an oxidation. The half cell reaction taking place at the electrode on which oxidation occurs is the oxidation half cell reaction And when the oxidation state of a substance decreases by gaining electrons, it is termed as a reduction. The half cell reaction taking place at the electrode on which reduction occurs is the reduction half cell reaction
(b)
Interpretation:
The electrodes at which oxidation and reduction is taking place is to be named.
Concept Introduction:
The oxidation half cell reaction takes place at anode and the reduction half cell takes place at cathode.
(c)
Interpretation:
The direction of flow of electrons in an external wire and electrical device connected between the electrodes is to be determined.
Concept Introduction:
In an
(d)
Interpretation:
The direction of flow of ions in the given salt bridge is to be determined.
Concept Introduction:
A salt bridge in an electrochemical cell consists of an inert electrolyte like
It is generally used to connect the two halves of the electrochemical cell to one another.
It prevents the
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Chemistry: The Molecular Science
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- For each reaction listed, determine its standard cell potential at 25 C and whether the reaction is spontaneous at standard conditions. (a) Mn(s)+Ni2+(aq)Mn2+(aq)+Ni(s) (b) 3Cu2+(aq)+2Al(s)2Al3+(aq)+3Cu(s) (c) Na(s)+LiNO3(aq)NaNO3(aq)+Li(s) (d) Ca(NO3)2(aq)+Ba(s)Ba(NO3)2(aq)+Ca(s)arrow_forwardYou have 1.0 M solutions of Al(NO3)3 and AgNO3 along with Al and Ag electrodes to construct a voltaic cell. The salt bridge contains a saturated solution of KCl. Complete the picture associated with this problem by a writing the symbols of the elements and ions in the appropriate areas (both solutions and electrodes). b identifying the anode and cathode. c indicating the direction of electron flow through the external circuit. d indicating the cell potential (assume standard conditions, with no current flowing). e writing the appropriate half-reaction under each of the containers. f indicating the direction of ion flow in the salt bridge. g identifying the species undergoing oxidation and reduction. h writing the balanced overall reaction for the cell.arrow_forwardAn aqueous solution of an unknown salt of gold is electrolyzed by a current of 2.75 amps for 3.39 hours. The electroplating is carried out with an efficiency of 93.0%, resulting in a deposit of 21.221 g of gold. a How many faradays are required to deposit the gold? b What is the charge on the gold ions (based on your calculations)?arrow_forward
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