MX is a sparingly soluble salt that follows t | vedclass

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(A) The electrode reaction for the metal/metal insoluble salt electrode is: $MX_{(s)} + e^- \rightarrow M_{(s)} + X^-_{(aq)}$.This can be expressed as

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$200$

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(A) The electrode reaction for the metal/metal insoluble salt electrode is: $MX_{(s)} + e^- ightarrow M_{(s)} + X^-_{(aq)}$.This can be expressed as the sum of two half-reactions:$M^+_{(aq)} + e^- ightarrow M_{(s)}$ $(E^{\circ} = 0.79 \ V)$$MX_{(s)} ightleftharpoons M^+_{(aq)} + X^-_{(aq)}$ $(K_{sp} = 10^{-10})$Using the relation $E^{\circ}_{cell} = E^{\circ}_{M^+/M} + \frac{0.059}{n} \log K_{sp}$:$E^{\circ}_{X^-/MX_{(s)}/M} = 0.79 + 0.059 \log(10^{-10})$$E^{\circ} = 0.79 + 0.059 	imes (-10)$$E^{\circ} = 0.79 - 0.59 = 0.20 \ V$Converting to $mV$: $0.20 \ V = 200 \ mV$.

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