We can silver plate a metallic object, such as a spoon, by immersing the spoon a

Question

We can silver plate a metallic object, such as a spoon, by immersing the spoon and a bar of silver (Ag) in a solution of silver nitrate (AgNO3). If we then connect the spoon and the silver bar to an electric generator and make a current flow from one to the other, the following reactions will occur at the immersed surfaces: Ag+ + [electron] ==> Ag (metal) Ag (metal) ==> Ag+ + [electron] The first reaction deposits silver on the spoon, and the second removes silver from the silver bar. How many electrons must we make flow from the silver bar to the spoon in order to deposit 5.0g of silver on the spoon?

Explanation / Answer

we know that the mass deposited is given by m = Zit z is electrochemical equivalent i id the current "it" would be the charge thus 5 = 96500 (q) q = 5.181 * 10^-5 or ne = 5.181 * 10^-5 or n = 5.181 * 10^-5 / 1.6 *10^-19 = 3.328 * 10^14 electrons

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