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Question

Which has maximum potential for the half-cell reaction?
2H + + 2e - H2
  1. 1.0 M HCl
  2. A solution having pH 4
  3. Pure water
  4. 1.0 M NaOH

A
1.0 M HCl
B
Pure water
C
A solution having pH 4
D
1.0 M NaOH
Solution
Verified by Toppr

using kontraurchs law which says
Aom(H2O)=Aom(HCl)+Ao(NaOH)Aom(NaCl)
We know the value of Aom for HCl,NaOH and NaCl thus by priosi calculations
AomH2O can br determined

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