The Product of Na2C204 and Ag+
When sodium oxalate (Na2C2O4) and silver ion(Ag+) reacts to form silver oxalate (Ag2C2O4). When they react, then sodium(Na) is replaced by silver(Ag) so the product will be silver oxalate (Ag2C2O4) and the release of sodium. Sodium oxalate is volatile upon heating around 140 degrees celsius, shock or friction.