Which of the following relationships is correct? (1) \( \mathrm{pH} \) of solution in hydrogen e...

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Which of the following relationships is correct?
(1) \( \mathrm{pH} \) of solution in hydrogen electrode
\[
=\frac{\text { Electrode potential }}{0.0591} \text { at } 298 \mathrm{~K}
\]
(2) \( \mathrm{E}_{\text {cell }}=\frac{0.0591}{\mathrm{n}} \log \mathrm{K}_{\mathrm{c}} \)
(3) Cell constant \( = \) Conductivity/Conductance
(4) \( \Delta \mathrm{G}^{\circ}=n \mathrm{nF}_{\text {cell }}^{\circ} \)
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