Electrodes used in electrocardiography are disposable, andmany incorporate silver. The metal is deposited in a thin layer ona small plastic “button,” and then some is converted to AgCl: Ag(s) +Cl⁻(aq) ⇌AgCl(s) +e⁻(a) If the surface area of the button is 2.0 cm² and the thicknessof the silver layer is 7.5X10⁻⁶m, calculate the volume (in cm³)of Ag used in one electrode.(b) The density of silver metal is 10.5 g/cm³. How many gramsof silver are used per electrode?(c) If Ag is plated on the button from an Ag⁺ solution with a cur-rent of 12.0 mA, how many minutes does the plating take?(d) If bulk silver costs $13.00 per troy ounce (31.10 g), what isthe cost (in cents) of the silver in one disposable electrode?
Electrodes used in electrocardiography are disposable, andmany incorporate silver. The metal is deposited in a thin layer ona small plastic “button,” and then some is converted to AgCl: Ag(s) +Cl⁻(aq) ⇌AgCl(s) +e⁻(a) If the surface area of the button is 2.0 cm² and the thicknessof the silver layer is 7.5X10⁻⁶m, calculate the volume (in cm³)of Ag used in one electrode.(b) The density of silver metal is 10.5 g/cm³. How many gramsof silver are used per electrode?(c) If Ag is plated on the button from an Ag⁺ solution with a cur-rent of 12.0 mA, how many minutes does the plating take?(d) If bulk silver costs $13.00 per troy ounce (31.10 g), what isthe cost (in cents) of the silver in one disposable electrode?
Introductory Chemistry: A Foundation
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ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
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Chapter17: Equilibrium
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Electrodes used in electrocardiography are disposable, andmany incorporate silver. The metal is deposited in a thin layer ona small plastic “button,” and then some is converted to AgCl: Ag(s) +Cl⁻(aq) ⇌AgCl(s) +e⁻(a) If the surface area of the button is 2.0 cm² and the thicknessof the silver layer is 7.5X10⁻⁶m, calculate the volume (in cm³)of Ag used in one electrode.(b) The density of silver metal is 10.5 g/cm³. How many gramsof silver are used per electrode?(c) If Ag is plated on the button from an Ag⁺ solution with a cur-rent of 12.0 mA, how many minutes does the plating take?(d) If bulk silver costs $13.00 per troy ounce (31.10 g), what isthe cost (in cents) of the silver in one disposable electrode?
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