Calculate mass of silver:

One-hundred cm³ of a solution of chloride are coulometrically titrated with silver ion using a current of 1.00 mA. Compute the concentration of the chloride if the endpoint is detected after 102 seconds. The silver ion titrant is produced at the anode (silver). The endpoint is detected potentiometrically using an Ag-SCE electrode pair.

Answer:

Using Faraday's laws, the mass of silver can be calculated.

m _Ag  =       r    ×   ×/96500 × n

Moles of _Ag ⁺ = molesof Cl - = mass of Ag ⁺/ Atomic mass of Ag ⁺ = i ×t/ nF = = 1.00 ×10^-3 ×1.02 ×10² /96500 × 1

= 1.1 × 10^-6 mol/100 cm³ = 1.1 × 10^-5 mol/ dm³