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A solution containing \( \mathrm{H}^{+} \)and \( \mathrm{D}^{+} \)ions is in equilibrium with a mixture of \( \mathrm{H}_{2} \) and \( \mathrm{D}_{2} \) gases at \( 25^{\circ} \mathrm{C} \). If the partial pressures of both gases are \( 1.0 \mathrm{~atm} \), find the ratio \( \left[\mathrm{D}^{+}\right] /\left[\mathrm{H}^{+}\right] \):
(Given : \( E_{\mathrm{D}^{+} / \mathrm{D}_{2}}^{\circ}=-0.003 \mathrm{~V} \) )
(a) \( 1.23 \)
(b) \( 1.12 \)
(c) \( 0.11 \)
(d) \( 1.0 \)
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