Cadmium Is a Toxic Heavy Metal If the Silver Ion Concentration Were 1

question 116

Multiple Choice

Cadmium is a toxic heavy metal. The U.S. Environmental Protection Agency limits the concentration of cadmium ions in drinking water to less than 4 * 10^-8 M. Assess the feasibility of monitoring of cadmium in drinking water using a voltaic cell based on the following half-reactions. $$\begin{aligned}\mathrm { Ag } ^ { + } ( a q ) + \mathrm { e } ^ { - } \longrightarrow \mathrm { Ag } ( s ) & E ^ { \circ } = + 0.7996 \mathrm {~V} \\\mathrm { Cd } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Cd } ( s ) & E ^ { \circ } = - 0.4030 \mathrm {~V}\end{aligned}$$ If the silver ion concentration were 1.000 M, what cadmium ion concentration at 298 K would increase the cell potential by 10 mV from the standard cell potential?

• A) 0.36 M
• B) 4.6 M
• C) 0.46 M
• D) 0.68 M
• E) 6.8 M

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CVP

An acronym for Cost-Volume-Profit analysis, a financial tool used to determine how changes in costs and volume affect a company's operating income and net income.

Basal Metabolism

The rate at which the body uses energy while at rest to maintain vital functions such as breathing and keeping warm.

Body Fat

The energy-storing tissue in the body comprised of cells containing stored fat.