Final answer:
To identify the copper(II) salt used in the electrolysis, calculate the charge in Coulombs, convert it to moles of electrons, then determine moles of copper, and use the molar mass to confirm the identity of the salt.
Step-by-step explanation:
The student has asked how to determine which copper(II) salt was used in the electrolysis process based on a given current and time that resulted in the deposition of 1.00 g of copper metal. To find this, the total charge passed through the solution during the process is needed.
First, convert the current and time into Coulombs using the formula Q = It, where Q is charge in Coulombs, I is current in amperes, and t is time in seconds. Then, using Faraday's laws of electrolysis, convert the charge to moles of electrons. Since the reduction of a Cu2+ ion requires two electrons, the number of moles of copper can be calculated by halving the number of moles of electrons. Finally, the molar mass of the produced copper is used to confirm the identity of the starting copper(II) salt.