Electrochemistry

• Electrolysis of Aqueous Copper(II) Nitrate
  With inert electrodes, aqueous copper(II) nitrate deposits copper at the cathode and produces oxygen at the anode while the solution becomes acidic.
• Does Current Run Forever in Water?
  Current can continue through water while a complete circuit and electrode reactions are sustained, but real cells eventually change or run out of reactants.
• Which Metal Corrodes in a Silver–Gold Galvanic Couple?
  When silver and gold are electrically connected in an electrolyte, silver usually acts as the anode and corrodes; conditions determine the rate.
• What Happens Atomically When Batteries Are Connected in Series?
  In a series connection, each battery’s chemical reactions contribute energy per unit charge, so aligned emfs add to give a larger total voltage.
• What Are the Best Settings for Electrolysis of Water?
  For a small water-electrolysis demonstration, use a current-limited DC supply, a chloride-free electrolyte, suitable electrodes, and strict gas-safety precautions.
• How to Identify the Anode and Cathode in a Concentration Cell
  Identify concentration-cell electrodes by comparing reduction potentials: in a standard metal–ion cell, the dilute side is the anode and the concentrated side is the.