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Q.

A hydrogen electrode is immersed in a solution with pH=0(HCl). By how much will the potential (reduction) change if an equivalent amount of NaOH is added to the solution. (Take pH2 =1atm & T = 298K )

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a

decrease by 0.41 V

b

increase by 0.41 V

c

increase by 59 mV

d

decrease by 59 mV

answer is C.

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Detailed Solution

pH changes from 0 to 7 
Accordingly Ered decreases by 0.059 log⁡10−7 i.e. 0.059×(−7)=−0.41 volt 

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A hydrogen electrode is immersed in a solution with pH=0(HCl). By how much will the potential (reduction) change if an equivalent amount of NaOH is added to the solution. (Take pH2 =1atm & T = 298K )