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The photoelectric current from \(\mathrm{Na}\) (work function, \(\mathrm{w}_{\mathrm{o}}=2.3 \mathrm{~eV}\) ) is stopped by the output voltage of the cell \(\mathrm{Pt}(\mathrm{s}) / \mathrm{H}_{2}\) (g, 1 bar) \(\mid \mathrm{HCl}\) (aq., \(\mathrm{pH}=1\) ) \(|\mathrm{AgCl}(\mathrm{s})| \mathrm{Ag}\) (s)
The \(\mathrm{pH}\) of aq. \(\mathrm{HCl}\) required to stop the photoelectric current from \(\mathrm{K}\left(\mathrm{w}_{1}=2.25 \mathrm{~eV}\right)\), all other conditions remaining the same, is \(\times 10^{-2}\) (to the nearest integer).
Given:
\(2.303 \frac{\mathrm{RT}}{\mathrm{F}}=0.06 \mathrm{~V} ; \mathrm{E}_{\mathrm{AgCl}|\mathrm{Ag}| \mathrm{Cl}}^{\circ}=0.22 \mathrm{~V}\) 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live