Directions: In the following questions, A statement of Assertion (A) ...
On increasing [Ag+], EAg+/ Ag will increase and it has a positive value.
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Directions: In the following questions, A statement of Assertion (A) ...
Assertion (A): EAg /Ag increases with an increase in the concentration of Ag ions.
Reason (R): EAg /Ag has a positive value.
The correct answer is option B, which states that both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Explanation:
EAg /Ag refers to the standard electrode potential of the silver/silver ion half-cell. It is a measure of the tendency of silver ions (Ag+) to gain electrons and form metallic silver (Ag). A positive value of EAg /Ag indicates that the reaction is spontaneous and favors the reduction of Ag+ ions to form Ag.
When the concentration of Ag ions increases, it means there are more Ag+ ions available for the reduction reaction. As a result, the tendency of Ag+ ions to gain electrons and form Ag increases. This leads to an increase in the standard electrode potential (EAg /Ag).
Reason (R) states that EAg /Ag has a positive value. This is true because the reduction of Ag+ ions to Ag is a favorable process, and therefore, the standard electrode potential for this half-cell is positive.
However, Reason (R) does not provide an explanation for why EAg /Ag increases with an increase in the concentration of Ag ions. The increase in concentration of Ag ions leads to an increase in the driving force for the reduction reaction, resulting in a higher standard electrode potential.
In conclusion, both Assertion (A) and Reason (R) are true. The Assertion states that EAg /Ag increases with an increase in the concentration of Ag ions, which is supported by the fact that the reduction reaction becomes more favorable with higher Ag+ ion concentration. However, Reason (R) does not provide an explanation for this relationship.