Acell consists of a gold wire and a saturated calomel electrode (s.c.e.) in a 0.160 m auno3 solution at 25 °c. the gold wire is connected to the positive end of a potentiometer, and the s.c.e. is connected to the negative end of the potentiometer. what is the half-reaction for the au electrode?

 Au + (aq)+ e ↔ Au(s) is the half reaction for the au electrode. Au is a chemical symbol of gold and has an atomic number 79. It is describe as  a bright, slightly reddish yellow, soft, dense, malleable and ductile metal. The answer in this question is  Au + (aq)+ e ↔ Au(s).

It should be rocky surfaces!