Left behind is a molten copper sulfide called matte.

Iron, manganese oxides and copper sulfide are often found filling gaps between pebbles.

The copper sulfide reacts with air to make copper metal and sulfur dioxide.

It is formed by the oxidation of galena and chalcopyrite and other copper sulfides.

Some copper sulfides are economically important ores.

Therefore, this group of copper sulfides shows ionic conductivity at slightly elevated temperatures.

It has also been used to study crystal structure and bonding in copper sulfides.

Replies: I would suppose that there might be some copper sulfide in there.

I also believe that adding weak acid to copper sulfide will not do much of anything.

So as more sulfide ion is made into H2S, the copper sulfide should dissolve.