Lead is a toxic metal. The U.S. Environmental Protection Agency limits the concentration of lead ions in drinking water to less than 5 *10^-⁸ M. Assess the feasibility of monitoring of lead in drinking water using a voltaic cell based on the following half-reactions. $$\begin{array} { l l } \mathrm { Zn } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow & E ^ { \circ } = - 0.762 \mathrm {~V} \ \mathrm { Zn } ( s ) & \ \mathrm {~Pb} ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Pb } ( s ) & E ^ { \circ } = - 0.126 \mathrm {~V} \end{array}$$ If the zinc ion concentration were 0.100 M, what lead ion concentration at 298 K would decrease the cell potential by 10 mV from the standard cell potential?

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The Answer of Lead is a toxic metal. The U.S. Environmental Protection Agency limits the concentration of lead ions in drinking water to less than 5 *10^-⁸ M. Assess the feasibility of monitoring of lead in drinking water using a voltaic cell based on the following half-reactions. $$\begin{array} { l l } \mathrm { Zn } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow & E ^ { \circ } = - 0.762 \mathrm {~V} \ \mathrm { Zn } ( s ) & \ \mathrm {~Pb} ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Pb } ( s ) & E ^ { \circ } = - 0.126 \mathrm {~V} \end{array}$$ If the zinc ion concentration were 0.100 M, what lead ion concentration at 298 K would decrease the cell potential by 10 mV from the standard cell potential?

Lead Is a Toxic Metal If the Zinc Ion Concentration Were 0